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Wikipedia

Apple Watch

February 09, 2023

Apple Watch is a line of smartwatches produced by Apple Inc. It incorporates fitness tracking, health-oriented capabilities, and wireless telecommunication, and integrates with iOS and other Apple products and services. The Apple Watch was released in April 2015,[18][19] and quickly became the best-selling wearable device: 4.2 million were sold in the second quarter of fiscal 2015,[20] and more than 100 million people were estimated to use an Apple Watch as of December 2020.[21] Apple has introduced a new generation of the Apple Watch with improved internal components each September[22]—each labeled by Apple as a 'Series', with certain exceptions.[a]

Apple Watch
Apple Watch Series 1 in Space Gray
DeveloperApple Inc.
Manufacturer
TypeSmartwatch
Release date1st generation: April 24, 2015; 7 years ago (2015-04-24)
Series 1 and Series 2: September 16, 2016; 6 years ago (2016-09-16)
Series 3: September 22, 2017; 5 years ago (2017-09-22)
Series 4: September 21, 2018; 4 years ago (2018-09-21)
Series 5: September 20, 2019; 3 years ago (2019-09-20)
Series 6 and SE (1st generation): September 18, 2020; 2 years ago (2020-09-18)
Series 7: October 15, 2021; 15 months ago (2021-10-15)
Series 8 and SE (2nd generation): September 16, 2022; 4 months ago (2022-09-16)
Ultra: September 23, 2022; 4 months ago (2022-09-23)
Discontinued1st generation: September 7, 2016; 6 years ago (2016-09-07)
Series 1: September 21, 2018; 4 years ago (2018-09-21)
Series 2: September 12, 2017; 5 years ago (2017-09-12)
Series 3: September 7, 2022; 5 months ago (2022-09-07)
Series 4: September 10, 2019; 3 years ago (2019-09-10)
Series 5: September 15, 2020; 2 years ago (2020-09-15)
Series 6: October 8, 2021; 16 months ago (2021-10-08)
SE (1st generation) and Series 7: September 7, 2022; 5 months ago (2022-09-07)
Units sold100 million (estimated, 2020)[3]
Operating systemwatchOS
System on a chip1st generation: Apple S1
Series 1: Apple S1P
Series 2: Apple S2
Series 3: Apple S3
Series 4: Apple S4
Series 5, SE (1st generation): Apple S5
Series 6: Apple S6
Series 7: Apple S7
Series 8, SE (2nd generation), Ultra: Apple S8
CPU1st generation: 32-bit single-core
Series 1, Series 2, Series 3: 32-bit dual-core
Series 4 onwards: 64-bit dual-core
Memory1st generation, Series 1, Series 2: 512 MB DRAM[4]
Series 3: 768 MB DRAM[5][4]
Series 4 and Series 5: 1 GB DRAM[6]
Series 6 onwards: 1.5 GB DRAM[7]
Storage1st generation, Series 1, Series 2: 8 GB[8][5][9]
Series 3: 8 GB (GPS) or 16 GB (Cellular)[10]
Series 4: 16 GB[11]
Series 5 onwards: 32 GB[12][13][14]
DisplayOLED[15] with strengthened Ion-X glass or Sapphire glass

1st generation, Series 1, Series 2, Series 3:
38 mm
33.96 mm (1.337 in) diagonal, 272×340 pixels, 326 dpi
42 mm
38.94 mm (1.533 in) diagonal, 312×390 pixels, 326 dpi
Series 4, Series 5, SE, Series 6:
40 mm
39.34 mm (1.549 in) diagonal, 324×394 pixels, 326 dpi
44 mm
44.63 mm (1.757 in) diagonal, 368×448 pixels, 326 dpi
Series 7, Series 8:
41 mm
42.95 mm (1.691 in) diagonal, 352×430 pixels, 326 dpi
45 mm
48.29 mm (1.901 in) diagonal, 396×484 pixels, 326 dpi
Ultra:
48.74 mm (1.919 in) diagonal, 410×502 pixels, 338 dpi

1st generation, Series 1, Series 2, Series 3, Series 4, Series 5: Force Touch
ConnectivityNFC, Diagnostics port
1st generation, Series 1, Series 2: Bluetooth 4.0[16][17]
Series 3: LTE cellular data (optional), Bluetooth 4.2[10]
Series 4, Series 5, SE, Series 6, Series 7, Series 8: LTE cellular data (optional), Bluetooth 5[11][12][13][14]
Ultra: LTE cellular data, Bluetooth 5.3
1st generation, Series 1, Series 2, Series 3, Series 4, Series 5, SE: Wi-Fi (802.11 b/g/n 2.4GHz only)
Series 6, Series 7, Series 8, Ultra: Wi-Fi (802.11 b/g/n 2.4GHz & 5 GHz)
PowerBuilt-in rechargeable Li-Po battery
Dimensions1st generation, Series 1:

38 mm
38.6 mm × 33.3 mm × 10.5 mm
(1.52 in × 1.31 in × 0.41 in)
42 mm
42 mm × 35.9 mm × 10.5 mm
(1.65 in × 1.41 in × 0.41 in)

Series 2, Series 3:
38 mm
38.6 mm × 33.3 mm × 11.4 mm
(1.52 in × 1.31 in × 0.45 in)
42 mm
42.5 mm × 36.4 mm × 11.4 mm
(1.67 in × 1.43 in × 0.45 in)
Series 4, Series 5, SE, Series 6:
40 mm
40 mm × 34 mm × 10.7 mm
(1.57 in × 1.34 in × 0.42 in)
44 mm
44 mm × 38 mm × 10.7 mm
(1.73 in × 1.50 in × 0.42 in)
Series 7, Series 8:
41 mm
41 mm × 35 mm × 10.7 mm
(1.61 in × 1.38 in × 0.42 in)
45 mm
45 mm × 38 mm × 10.7 mm
(1.77 in × 1.50 in × 0.42 in)
Ultra:

49 mm × 44 mm × 14.4 mm
(1.93 in × 1.73 in × 0.57 in)
Backward
compatibility		watchOS 1 – 3: iPhone 5 or later
watchOS 4 – 5: iPhone 5S or later (GPS Only), iPhone 6 or later (GPS + Cellular)
watchOS 6 – 8: iPhone 6S or later
watchOS 9: iPhone 8 or later
PredecessoriPod Nano
Websiteapple.com/watch

Each Series has been initially sold in multiple variants defined by the watch casing's material, color, and size (except for the budget watches Series 1 and SE, available only in aluminum,[23][26] and the Ultra, available only in 49 mm uncolored titanium[25]), and beginning with Series 3, by the option in the aluminum variants for LTE cellular connectivity, which comes standard with the other materials.[27] The band included with the watch can be selected from multiple options from Apple, and watch variants in aluminum co-branded with Nike and in stainless steel co-branded with Hermès are also offered, which include exclusive bands, colors, and digital watch faces carrying those companies' branding.[27]

The Apple Watch operates in conjunction with the user's iPhone for functions such as configuring the watch and syncing data with iPhone apps, but can separately connect to a Wi-Fi network for data-reliant purposes, including communications, app use, and audio streaming.[28][29] LTE-equipped models can also perform these functions over a mobile network, and can make and receive phone calls independently when the paired iPhone is not nearby or is powered-off, substantially reducing the need for an iPhone after initial setup.[b] The oldest iPhone model that is compatible with any given Apple Watch depends on the version of system software installed on each device.[32] As of September 2022, new Apple Watches come with watchOS 9 preinstalled and require an iPhone running iOS 16, which is available for the iPhone 8 and later.[33]

Development

The goal of the Apple Watch was to complement an iPhone and add new functions, and to free people from their phones.[34]

Kevin Lynch was hired by the Apple to make wearable technology for the wrist. He said: "People are carrying their phones with them and looking at the screen so much. People want that level of engagement. But how do we provide it in a way that's a little more human, a little more at the moment when you're with somebody?"[34] Apple's development process was held under wraps until a Wired article revealed how some internal design decisions were made.[34]

Rumors as far back as 2011 speculated that Apple was developing a wearable variation of the iPod that would curve around the user's wrist, and feature Siri integration.[35] In February 2013, The New York Times and The Wall Street Journal reported that Apple was beginning to develop an iOS-based smartwatch with a curved display.[36] That same month, Bloomberg reported that Apple's smartwatch project was "beyond the experimentation phase" with a team of about 100 designers.[37] In July 2013, Financial Times reported that Apple had begun hiring more employees to work on the smartwatch, and that it was targeting a retail release in late 2014.[38]

Unveiling and release

In April 2014, Apple CEO Tim Cook told The Wall Street Journal that the company was planning to launch new products that year, but revealed no specifics.[39]

In June 2014, Reuters reported that production was expected to begin in July for an October release.[40]

During a September 2014 press event where the iPhone 6 was also presented, the new watch product was introduced by Tim Cook. After a video focusing on the design process, Cook reappeared on stage wearing an Apple Watch.[41]

In comparison to other Apple products and competing smartwatches, marketing of the Apple Watch promoted the device as a fashion accessory.[42] Apple later focused on its health and fitness-oriented features, in an effort to compete with dedicated activity trackers. The watchOS 3 added fitness tracking for wheelchair users, social sharing in the Activity app, and a Breathe app to facilitate mindfulness.[43]

The device was not branded as "iWatch", which would have put it in line with its product lines such as iPod, iPhone, and iPad. In the United States, the "iWatch" trademark is owned by OMG Electronics – who was crowdfunding a device under the same name; it is owned in the European Union by Irish firm Probendi.[44] In July 2015, Probendi sued Apple Inc. for trademark infringement, arguing that through keyword advertising on the Google search engine, it caused advertising for the Apple Watch to appear on search results pages when users searched for the trademarked term "iWatch".[45]

Release

Pre-orders for the Apple Watch began on April 10, 2015, with the official release on April 24.[46] Initially, it was not available at the Apple Store; customers could make appointments for demonstrations and fitting, but the device was not in-stock for walk-in purchases and had to be reserved and ordered online. CNET felt that this distribution model was designed to prevent Apple Store locations from having long line-ups due to the high demand.[47][48] The first ever retail store to display the Apple Watch to the public was Colette in Paris.[49] Later on, selected models were available in limited quantities at luxury boutiques and authorized resellers.[50]

On June 4, 2015, Apple announced that it planned to stock Apple Watch models at its retail locations.[48]

On August 24, 2015, Best Buy announced that it would begin stocking Apple Watch at its retail stores by the end of September.[51] Both T-Mobile US and Sprint also announced plans to offer Apple Watch through their retail stores.[52]

In September 2015, Apple launched a new subset of Apple Watch, with a stainless steel body and leather band, in collaboration with Hermès.[53] The following year, Apple launched another subset of Apple Watches in collaboration with Nike dubbed "Apple Watch Nike+". Both subsets featured cosmetic customization, but otherwise functioned like standard Apple Watches.[54]

Apple Watch went on sale in India in November 2015.[55] The device also launched in Chile, the Philippines, Indonesia, and South Africa.[56]

Specifications

Design and materials

 
Series 4 (40 mm, aluminum, Space Gray color)

Each series of Apple Watch is offered in multiple variants, distinguished by the casing's material, color, and size,[57] with special bands and digital watch faces available for certain variants co-branded with Nike and Hermès, which are also sometimes accompanied by other unique extras, like stainless steel charging pucks, premium packaging, and exclusive color basic bands.[58]

Originally at launch, the Apple Watch was marketed as one of three "collections", designating the case material. In order of increasing cost, the collections were:

  • Apple Watch Sport (Aluminium case)
  • Apple Watch (Stainless steel case)
  • Apple Watch Edition (Originally released as an 18kt gold casing with newer materials in later models)

Starting with Series 1/Series 2, Apple dropped the "Sport" moniker from the branding (apart from the sport bands), and the Apple Watch was available with either an aluminum (lowest cost) or stainless steel case. "Apple Watch Edition" branding still exists, but now refers to watch casings made from ceramic or titanium.[59]

Apple did not explicitly market the first-generation Apple Watch as being waterproof, stating that it can withstand splashes of water (such as rain and hand washing), but does not recommend submersion (IPX7). Apple introduced a higher level of water resistance with the release of the Apple Watch Series 2, and the device was explicitly advertised as being suitable for swimming and surfing.[60] The Series 7 also includes an IP6X certification for dust resistance.

Size

Since the introduction of the Apple Watch, it has been available in two sizes, primarily affecting screen resolution and area. The smaller size at launch was 38 mm (1.5 in), referring to the approximate height of the watch case; the larger size was 42 mm (1.7 in). Starting with Series 4, the two nominal sizes changed to 40 mm (1.6 in) (smaller) and 44 mm (1.7 in) (larger).[61] The nominal sizes changed again with the introduction of Series 7: 41 mm (1.6 in) (smaller) and 45 mm (1.8 in) (larger).

The overall shape and width of the watch has not changed significantly since its release, so customizable bands and accessories are typically compatible with any Apple Watch of the same size class. Bands that fit the smaller size class (38 mm (1.5 in), 40 mm (1.6 in), and 41 mm (1.6 in) watches) and larger size class (42 mm (1.7 in), 44 mm (1.7 in), and 45 mm (1.8 in) watches) are generally interchangeable within the class.[62] The casing of the watch includes a mechanism to allow the user to change the straps without special tools.

Input and sensors

 
Underside of three Apple Watches, showing the digital crown and updates to the back sensors; L–R: Series 3, 5, and 6

For input, the Watch features a "digital crown" on one side which can be turned to scroll or zoom content on screen, and pressed to return to the home screen. Next to the crown (on the same side of the watch) is the Side Button, which can be used to display recently used apps and access Apple Pay, which is used for contactless payment.[63] The Watch also prominently features a touchscreen; prior to Series 6/SE, the screen included Force Touch technology, which enabled the display to become pressure-sensitive and therefore capable of distinguishing between a tap and a press for displaying contextual menus.[15] Force Touch has since been physically removed in Watch Series 6 and Watch SE,[64] and has been disabled via software on Watch Series 5 and earlier on models supporting watchOS 7.[65]

Additional sensors integrated into the Watch include an accelerometer, gyroscope, and barometer, which are used to determine device orientation, user movement, and altitude.[66] The back of all Apple Watches are equipped with a Heart Rate Monitor, which projects infrared and green light from light-emitting diodes (LEDs) onto the user's skin and photodiodes measure the varying amount of light reflected. Because blood absorbs green light and reflects red light, the amounts of each type of reflected light are compared to determine heart rate. The Watch adjusts the sampling rate and LED brightness as needed.[66] Starting with the Series 4, Apple added electrical sensors to the Digital Crown and back, allowing the Watch to take electrocardiogram (ECG) readings;[67] the device won FDA clearance in October 2018, becoming the first consumer device capable of taking an ECG.[68] A blood oxygen monitor was added with the Series 6 in 2020, albeit as a "wellness" device not capable of diagnosing a medical condition.[69] The blood oxygen monitor added red LEDs to the back, allowing the watch to determine oxygen levels by measuring blood color.[70] The Watch SE reverted to the capabilities of the Series 3, dropping the electrical sensors and blood oxygen monitor.[71]

Battery

Apple rates the device's battery for 18 hours of mixed usage.[15][72] Apple Watch is charged by means of inductive charging.[18] If the watch's battery depletes to less than 10 percent, the user is alerted and offered to enable Low Power Mode, which allows the user to continually use the watch while some features are disabled. The watch then reverts to its original mode when the battery is sufficiently charged.[73]

Bands

Apple Watch comes with an included band (strap) to attach it to the user's wrist. The band can be easily changed to other types by holding down the connectors on the bottom of the watch and sliding the band pieces out. Third party bands are compatible with Apple Watch; Apple produces bands in a variety of materials and colours. Bands designed for the original Series 1-3 38 mm and 42 mm case sizes are compatible with the Series 4-6 40 mm and 44 mm cases, as well as the Series 7 41 mm and 45 mm cases, respectively.[74]

Starting with Apple Watch Series 5, Apple introduced the online Apple Watch Studio which allows customers to mix and match bands on purchase, eliminating the need to purchase a specific combination of case and band design, and allows for a simplification of packaging (since Apple Watch Series 4 in 2018).[75]

Hardware

First generation

The 1st generation Apple Watch (colloquially referred to as Series 0) uses the single-core S1 system-on-chip. It does not have a built-in GPS chip, instead relying on a paired iPhone for location services. It features a new linear actuator hardware from Apple called the "Taptic Engine", providing realistic haptic feedback when an alert or a notification is received, and is used for other purposes by certain apps.[15] The watch is equipped with a built-in heart rate sensor, which uses both infrared and visible-light LEDs and photodiodes.[76]

All versions of the first-generation Apple Watch have 8 GB of storage; the operating system allows the user to store up to 2 GB of music and 75 MB of photos. When the Apple Watch is paired with an iPhone, all music on that iPhone is also available to be controlled and accessed from the Apple Watch.[77] Software support for the first Apple Watch ended with watchOS 4.3.2.[78]

Second generation (Series 1 and 2)

The second generation Apple Watch has two models; the Apple Watch Series 1 and Apple Watch Series 2.

The Series 1 has a variant of the dual-core Apple S2 processor with GPS removed, known as the Apple S1P. It has a lower starting price than first generation.[79] The Series 1 was sold only in Aluminium casings.

The Series 2 has the dual-core Apple S2 processor, water resistance to 50 meters, a display twice as bright, at 1000 nits, and a GPS receiver.[79][60] The Series 2 was sold in casings of anodized Aluminium, Stainless Steel and Ceramic.

The Apple Watch Edition Series 2 is the first Apple Watch model to add the new White ceramic case color option. Both Yellow Gold and Rose Gold 18K gold case color options have been removed.

The Apple Watch Nike+ Series 2 is the first Apple Watch model available as the Nike, Inc. collaborate special option.

The Apple Watch Series 1 and Apple Watch Series 2 are the final Apple Watch models available with Yellow Gold and Rose Gold aluminum case color options.They have an advertised 18 hours of battery life.

The software support for both Apple Watch Series 1 and Apple Watch Series 2 ended with watchOS 6.3.

Third generation (Series 3)

The Apple Watch Series 3 features a faster processor, the dual-core S3, Bluetooth 4.2 (compared to 4.0 on older models), a built-in altimeter for measuring flights of stairs climbed, increased RAM size, and is available in a variant with LTE cellular connectivity. Siri is able to speak through the onboard speaker on Apple Watch Series 3 due to the increased processing speed of the Watch.[80]

Series 3 features LTE cellular connectivity for the first time in an Apple Watch, enabling users to make phone calls, iMessage and stream Apple Music and Podcasts directly on the watch, independent of an iPhone. The LTE model contains an eSIM[81] and shares the same mobile number as the user's iPhone.[82]

The Apple Watch Series 3 is the first Apple Watch model to add the new Gold aluminum case color option to match the color introduced with the iPhone 8 in 2017. Both Yellow Gold and Rose Gold aluminum case color options have been removed. It is now available in Space Gray, Silver and Gold aluminum case color options, available in Space Black and Silver stainless steel case color options.

The Apple Watch Edition Series 3 is the first and only Apple Watch model to add the new Gray ceramic case color option. It is available in White and Gray ceramic case color.

The software support for the Apple Watch Series 3 ended with watchOS 8.7.1.

Fourth generation (Series 4)

 
Apple Watch Series 4

The Apple Watch Series 4[83] is the first predominant redesign of the Apple Watch, featuring larger displays with thinner bezels and rounded corners, and a slightly rounder, thinner chassis with a redesigned ceramic back. Internally there is a new S4 64-bit dual-core processor, capable of up to double the S3's performance, upgraded 16 GB storage, and a new electrical heart sensor. The microphone was moved to the opposite side between the side button and the digital crown to improve call quality. Other changes include the digital crown incorporating haptic feedback with the Apple Haptic Engine and includes the new Apple-designed W3 wireless chip.

The ECG system has received clearance from the United States Food and Drug Administration, a first ever for a consumer device,[84] and is supported by the American Heart Association.[85] The Series 4 can also detect falls, and can automatically contact emergency services unless the user cancels the outgoing call.

The watch received mostly positive reviews from critics. TechRadar gave it a score of 4.5/5, calling it one of the top smartwatches, while criticizing the short battery life.[86] Digital Trends gave it a score of 5/5, calling it Apple's best product and praising the design, build quality, and software, among others, while criticizing the battery life.[87] CNET gave it a score of 8.2/10, calling it the "best overall smartwatch around", while criticizing the battery life and lack of watch face options.[88] T3 gave it a score of 5/5, calling it a "truly next-gen smartwatch" due to its thinner body and bigger screen compared to the Series 3, and health features.[89]

The Apple Series 4 is the first Apple Watch model to add the new Gold stainless steel color option to match the color introduced with the iPhone XS in 2018. It is now available in Space Gray, Silver and Gold aluminum case color options, available in Space Black, Silver and Gold stainless steel case color options. All the ceramic case color options have been removed until the launch of the Apple Watch Edition Series 5 in 2019.

Fifth generation (Series 5 & SE (1st gen))

The Apple Watch Series 5 was announced on September 10, 2019.[90] Its principal improvements over its predecessor were the addition of a compass and an always-on display with a low-power display driver capable of refresh rates as low as once per second. Additional new features include International Emergency Calling, enabling emergency calls in over 150 countries, a more energy-efficient S5 processor,[91] improved ambient light sensor, and storage doubled to 32 GB. The release of the Series 5 also brought back the "Edition" model, with a ceramic model absent from the previous generation. A new titanium model was also included in two colors: natural and Space Black.[92]

At its September 2020 product introduction event, Apple also announced the Apple Watch SE, a lower-cost model.[93] The SE incorporates the same always-on altimeter as the Series 6,[94] but uses the previous-generation S5 processor and previous- (i.e. second) generation optical heart rate sensor; does not include ECG and blood oximeter sensors or an always-on display; and does not include UWB or 5 GHz Wi-Fi communication capabilities.

The Series 5 and above (including the SE model introduced in 2020) also incorporate enhanced hardware- and software-based battery and performance management functionality.[95]

Critics generally gave it a positive review. CNET gave it a score of 4/5, concluding, "The Apple Watch continues to be one of the best smartwatches, but it remains limited by being an iPhone accessory for now."[96] Digital Trends gave it a score of 4.5/5.[97] The Verge gave it a score of 9/10.[98]

The Apple Watch Series 5 is now available in Space Gray, Silver and Gold aluminum case color options, available in Space Black, Silver and Gold stainless steel case color options.

The Apple Watch Edition Series 5 is the final Apple Watch model available with White ceramic case color option. It is the first Apple Watch model to add the new Natural and Space Black titanium case color options. It is now available in White ceramic case color option, available in Natural and Space Black titanium case color options.

The 1st-generation Apple Watch SE is the final Apple Watch model available with Space Gray and Gold (introduced with iPhone 8 in 2017) case color options. It is now available with Space Gray, Silver and Gold case color options.

Sixth generation (Series 6)

The Apple Watch Series 6 was announced on September 15, 2020, during an Apple Special Event and began shipping on September 18. Its principal improvement over its predecessor is the inclusion of a sensor to monitor blood oxygen saturation.[99]

Additional features include a new S6 processor that is up to 20% faster than the S4 and S5,[93] a 2.5× brighter always-on display, and an always-on altimeter.[100] The S6 incorporates an updated, third generation optical heart rate sensor and also enhanced telecommunication technology, including support for ultra-wideband (UWB) via Apple's U1 chip, and the ability to connect to 5 GHz Wi-Fi networks. The Series 6 watch was updated with faster charging hardware such that it completes charging in ~1.5 hours.[101] Force Touch hardware was removed, consistent with the removal of all Force Touch functionality from watchOS 7.

The Apple Watch Series 6 is the final Apple Watch model available with Space Gray and Gold (introduced with the iPhone 8 in 2017) aluminum case color options. It is the first time adding the Product Red and Blue aluminum case color options. It is available in Space Gray, Silver, Gold, Blue and Product Red aluminum case color options, available in Graphite, Silver and Gold stainless steel case color options. The Gold stainless steel case color option is now in classic yellow gold and the Graphite stainless steel case color option is the new color replacing Space Black color before introduced with the iPhone 12 Pro in 2020.

The Apple Watch Edition Series 6 is now available in Natural and Space Black titanium case color options. The ceramic case option was removed.

Seventh generation (Series 7)

The Apple Watch Series 7 was announced on September 14, 2021, during an Apple Special Event.[102] Pre-orders opened on October 8, with earliest shipping dates starting on October 15.

Enhancements relative to the prior-generation Series 6 watch include a more rounded design with a case 1 mm larger than the Series 6; a display that is 70% brighter indoors and approximately 20% larger; improved durability via a crack-resistant front crystal;[103] IP6X certification for resistance to dust; 33% faster charging via improved internal electronics and an enhanced, USB-C based fast-charging cable; support for BeiDou (China's satellite navigation system); and the availability of an on-screen keyboard that can be tapped or swiped.[104] The Series 7 is also equipped with new hardware that enables ultra-rapid, short-range wireless data transfer at 60.5 GHz, though Apple has not fully explained this new functionality.[105]

The Apple Watch Edition Series 7 is the final Apple Watch model to be available in Natural and Space Black titanium case color options.

The Apple Watch Series 7 is now available in Midnight, Starlight, Blue, Green and Product Red aluminum case color option, available in Graphite, Silver and Gold (introduced with Apple Watch Series 6 and iPhone 12 Pro in 2020) stainless steel case color option. Both Space Gray and Gold (introduced with iPhone 8 in 2017) aluminum case color options have been removed. The Silver aluminum case color option was removed until the launch of the Apple Watch Series 8 in 2022.

Eighth generation (Series 8, SE (2nd gen) & Ultra)

The Apple Watch Series 8, the second-generation Apple Watch SE, and Apple Watch Ultra were announced on September 7, 2022, during an Apple Special Event.[102] Pre-orders opened on the same day, with the Series 8 and 2nd gen SE shipping on September 16, while the Ultra ships on September 23.[106]

Enhancements in the Series 8, relative to the prior-generation Series 7 watch, include a new temperature sensor and more precise accelerometers and gyroscopes capable of detecting the occurrence of a car crash.[107]

Aluminum case models are available in Midnight, Silver, Starlight and Product Red, and the stainless steel models are available in Silver, Graphite and Gold. The Blue and Green case colors are discontinued, and the Series 8 is not available with a titanium case.

 
Apple Watch Ultra logo
 
Apple Watch Ultra on wrist

The Apple Watch Ultra is the first Apple Watch model to feature a new tough and rugged titanium casing in natural finish, larger 49 mm case size, flat sapphire front crystal, and additional orange Action button located other side to both Digital Crown and Side Button. It is designed for the extreme activities like endurance sports, elite athletes, trailblazing, adventure, ocean, and water sports.

The 2nd-generation Apple Watch SE is available in Midnight, Silver and Starlight case color options. The Space Gray and Gold case color options have been discontinued.

Software

Apple Watch runs watchOS, whose interface is based around a home screen with circular app icons, which can be changed to a list view in the devices settings. The OS can be navigated using the touchscreen or the crown on the side of the watch.[15] During its debut, the first generation Apple Watch needed to be paired with an iPhone 5 or later running iOS 8.2 or later; this version of iOS introduced the Apple Watch app, which is used to pair the watch with an iPhone, customize settings and loaded apps, and highlight compatible apps from the App Store.[15]

The Apple Watch is capable of receiving notifications, messages, and phone calls via a paired iPhone.[15] "Glances" allowed users to swipe between pages containing widget-like displays of information; however, this feature was replaced by a new Control Center. watchOS also supports Handoff to send content from Apple Watch to an iOS or macOS device,[15] and act as a viewfinder for an iPhone camera,[63] Siri is also available for voice commands, and is capable of responding with voice prompts on the Series 3 watches.[15] Apple Watch also supports Apple Pay, and enables its use with older iPhone models that do not contain near-field communication (NFC) support.[15]

Apple Watch's default apps are designed to interact with their iOS counterparts, such as Mail, Phone, Calendar, Messages, Maps, Music, Photos, Reminders, Remote (which can control iTunes and Apple TV), Stocks, and Wallet.[15] Using the Activity and Workout apps, a user can track their physical activity and send data back to the iPhone for use in its Health app and other HealthKit-enabled software.[15] With watchOS 3, Reminders, Home, Find My Friends, Heart Rate, and Breathe were added to the stock apps.

With the release of watchOS 4 and the Series 3 Apple Watch, iPhone 5 and iPhone 5C support was dropped, requiring users to use an iPhone 5S or later with iOS 11 or later to use watchOS 4. Apple Watches still running watchOS 3 or below remain compatible with the iPhone 5 and iPhone 5C. Further, watchOS 5 dropped support for the original (Series 0) Apple Watch.[108] watchOS 6 was the final version to support the Series 1 and Series 2 Apple Watch. It dropped support for the iPhone 5S, iPhone 6, and iPhone 6 Plus, requiring users to use an iPhone 6S or later with iOS 13 or later. watchOS 8 was the final version to support the Apple Watch Series 3. watchOS 9 dropped support for the Apple Watch Series 3, iPhone 6S, iPhone 6S Plus, first-generation iPhone SE, iPhone 7, and iPhone 7 Plus, requiring users to use an iPhone 8 or later with iOS 16 or later paired with an Apple Watch SE, Apple Watch Series 4 or later.

Version history

See also: watchOS version history

At WWDC 2015, Tim Cook announced watchOS 2.0; described by CNET as a "significant revamp", it included a new software development kit that allows more direct access to the device's hardware, new watch faces, the ability to reply to an e-mail, and other features.[109] WatchOS 2.0 was released in September 2015.[110] Following the software update, some users experienced issues with lag.[111]

watchOS 3.0 was announced at WWDC 2016, with a priority on performance. Users are able to keep apps running in memory as well as receive background updates and refreshed information. Other updates include a new Dock invoked with the side button to replace the performance-laden Glances, an updated Control Center, and new reply options on Messages. Several new watch faces have also been added, including Minnie Mouse, along with the ability to switch watch faces from the lock screen simply by swiping. A new feature called SOS allows users to hold the dock button to make a call to the local emergency line and pull up the user's Medical ID. Another feature is Activity Sharing, which allows sharing of workouts with friends and even sending their heartbeats to one another. A new app called Breathe guides users through breathing exercises throughout the day, with visuals and haptic feedback. It was made available to the public in September 2016.

watchOS 3.1 was released to the public in October 2016, and watchOS 3.2 was released in March 2017.[112] Both updates added minor improvements and bug fixes.

WatchOS 4.0 was announced at WWDC 2017 and released to the public in September 2017. WatchOS 4 features a proactive Siri watch face, personalized activity coaching, and an entirely redesigned music app. It also introduces Apple GymKit, a technology platform to connect workouts with cardio equipment.

WatchOS 4.3 was released in March 2018. It introduced support for Nightstand mode in portrait orientation. It brought back the ability for music playing on the iPhone to be controlled using the Music app on the Apple Watch and also enabled control of playback and volume on Apple's HomePod. Other new features included a new charging animation and a new app loading animation. Activity data was added to the Siri watch face, and the battery complication more accurately reports battery life.

watchOS 5.0 was first shown to the public at the San Jose WWDC developer conference held by Apple. It introduced an instant watch-to-watch walkie-talkie mode, all-new Podcasts app, raise-wrist-to-speak Siri, customizable Control Center, and the ability to access the notification center and control center from apps. Other features included support for WebKit to view web pages, six new watch faces, and new workout running features.[113] It was released to the public in September 2018.[114] On the newest release of watchOS beta the sleep feature was shown on screen, this would eliminate the need to use third-party apps.

watchOS 6.0 was released to the public in September 2019. It introduced more native iOS apps such as voice memos, calculator, and a native watchOS app store. watchOS 6.0 also introduced new features such as the noise app that allows you to measure the sound around you in decibels, menstrual tracking, and new watch faces. Other features include Siri being able to tell users what music they are listening to, activity trends, and a new UI framework for developers.

watchOS 7.0 was announced on June 22, 2020, at the WWDC, and released on September 16, 2020; new functionalities include sleep tracking, additional watch faces, handwashing detection and new workouts such as dancing.[115]

watchOS 8.0 was announced on June 7, 2021, at the WWDC, and released on September 20, 2021. It replaces the Breathe app with a new Mindfulness app, and adds a Focus mode as well as a Portrait Watch Face, updates to the Messages and Home apps, Contacts and Find My apps, and a redesigned Photos app.

watchOS 9.0 was released to public on September 13, 2022. It enhances the Workout display with new views of metrics like Activity rings, Heart Rate Zones, Power, and Elevation. It also support better sleep tracking and additional watch faces.

Third-party apps

In watchOS 1, third-party WatchKit applications run in the background on the iPhone as an application extension while a set of native user interface resources are installed on Apple Watch.[116] Thus, watchOS apps must be bundled within their respective iOS app, and are synced to the watch either manually, or automatically upon installation of the phone app.[15]

With the release of watchOS 2, Apple made it mandatory for new watch apps to be developed with the watchOS 2 SDK from June 1, 2016, onwards; no third-party languages or SDKs can be used to develop apps.[117] This allowed for developers to create native apps that are run on the watch itself, thus improving the responsiveness of third-party apps.

In watchOS 5 and earlier, all watchOS apps are dependent apps – the watchOS app relies on an iOS companion app in order to function properly.[118] In watchOS 6 or later, developers are able to create completely independent watchOS apps, and no longer require an app to be installed on the paired iPhone. This was assisted by the introduction of a separate App Store on the Apple Watch itself.[119]

Models

See also: List of iOS devices § Apple Watch
 
An Apple Store showcase with various Apple Watch models

As of September 2021, eight generations and eight series of Apple Watch have been released.

Apple Watch models have been divided into five "collections": Apple Watch (1st generation-present), Apple Watch Sport (1st generation), Apple Watch Nike+ (Series 2-present), Apple Watch Hermès (1st generation-Series 5, Series 6-present), and Apple Watch Edition (1st generation-Series 3, Series 5, Series 6-present). They are differentiated by combinations of cases, bands, and exclusive watch faces; Apple Watch comes with either aluminum or stainless steel cases, and various watch bands (only stainless steel was offered for Apple Watch 1st generation); Apple Watch Sport came with aluminum cases and sport bands or woven nylon bands; Apple Watch Nike+ comes with aluminum cases and Nike sport bands or sport loops; Apple Watch Hermès uses stainless steel cases and Hermès leather watch bands (also included is an exclusive Hermès orange sport band); and Apple Watch Edition came with ceramic cases and various bands (the 1st generation Apple Watch Edition used 18 karat yellow or rose gold).[120] With the Series 5, the Edition tier was expanded with a new titanium case.

Apple Watch Series 1 models were previously only available with aluminum cases and sport bands.[121]

As of Series 3, each Apple Watch model in aluminum, the least expensive casing, is available either with or without LTE cellular connectivity, while the models with the other casing materials available (stainless steel and sometimes ceramic and titanium) always include it.[30][122]

Each model through Series 3 comes in a 38- or 42-millimeter body, with the larger size having a slightly larger screen and battery.[15] The Series 4 was updated to 40- and 44-millimeter models, respectively. The Series 7 has been updated to 41- and 45-millimeter models. Each model has various color and band options. Featured Apple-made bands include colored sport bands, sport loop, woven nylon band, classic buckle, modern buckle, leather loop, Milanese loop, and a link bracelet.[15]

Comparison of models

Legend:   Vintage   Discontinued and unsupported   Discontinued, but still supported   Current or still sold

Support

Watch Released with Release date Discontinued Final supported OS Support ended Support lifespan
1st generation watchOS 1.0 (iOS 8.2) April 24, 2015; 7 years ago (2015-04-24) September 7, 2016; 6 years ago (2016-09-07) watchOS 4.3.2 (iOS 11.4.1)[A] September 17, 2018; 4 years ago (2018-09-17) 3 years, 4 months
Series 1 watchOS 3.0 (iOS 10.0) September 12, 2016; 6 years ago (2016-09-12) September 12, 2018; 4 years ago (2018-09-12) watchOS 6.3 (iOS 13.7)[B] September 15, 2020; 2 years ago (2020-09-15) 4 years
Series 2 watchOS 3.0 (iOS 10.0) September 16, 2016; 6 years ago (2016-09-16) September 12, 2017; 5 years ago (2017-09-12) watchOS 6.3 (iOS 13.7) September 15, 2020; 2 years ago (2020-09-15) 3 years, 11 months
Series 3 watchOS 4.0 (iOS 11.0) September 22, 2017; 5 years ago (2017-09-22) September 7, 2022; 5 months ago (2022-09-07) watchOS 8.7.1 (iOS 15.6.1)[C] September 13, 2022; 4 months ago (2022-09-13) 4 years, 11 months
Series 4 watchOS 5.0 (iOS 12.0) September 21, 2018; 4 years ago (2018-09-21) September 10, 2019; 3 years ago (2019-09-10) watchOS 9.0 (iOS 16.0) (Current) 4 years, 4 months +
Series 5 watchOS 6.0 (iOS 13.0) September 20, 2019; 3 years ago (2019-09-20) September 15, 2020; 2 years ago (2020-09-15) 3 years, 4 months +
SE (1st generation) watchOS 7.0 (iOS 14.0) September 18, 2020; 2 years ago (2020-09-18) September 7, 2022; 5 months ago (2022-09-07) 2 years, 4 months +
Series 6 watchOS 7.0 (iOS 14.0) September 18, 2020; 2 years ago (2020-09-18) September 14, 2021; 16 months ago (2021-09-14) 2 years, 4 months +
Series 7 watchOS 8.0 (iOS 15.0) October 15, 2021; 15 months ago (2021-10-15) September 7, 2022; 5 months ago (2022-09-07) 1 year, 3 months +
SE (2nd generation) watchOS 9.0 (iOS 16.0) September 16, 2022; 4 months ago (2022-09-16) In production 4 months +
Series 8 watchOS 9.0 (iOS 16.0) September 16, 2022; 4 months ago (2022-09-16) In production 4 months +
Ultra watchOS 9.0 (iOS 16.0) September 23, 2022; 4 months ago (2022-09-23) In production 4 months +
  1. ^ watch OS 4.3.2 requires iOS version 11.4, but higher version iOS can still pair with a watchOS 4 watch.
  2. ^ watch OS 6.3 requires iOS version 13.5, but iOS 14 can still pair with a watchOS 6 watch.
  3. ^ watch OS 8.7.1 requires iOS version 15.6, but iOS 16 can still pair with a watchOS 8 watch.
OS release Model
Vintage Unsupported Vintage Unsupported Discontinued Current
1st gen Series 1 Series 2 Series 3 Series 4 Series 5 SE (1st gen) Series 6 Series 7 SE (2nd gen) Series 8 Ultra
watchOS 1   — — — — — — — — — — —
watchOS 2   — — — — — — — — — — —
watchOS 3       — — — — — — — — —
watchOS 4         — — — — — — — —
watchOS 5           — — — — — — —
watchOS 6             — — — — — —
watchOS 7                 — — — —
watchOS 8                   — — —
watchOS 9                        

Specifications

Specification[123] 1st generation[16][124][125] 2nd generation (Series 1)[126][79] 2nd generation (Series 2)[17][79] 3rd generation (Series 3)[10][123] 4th generation (Series 4)[11][127] 5th generation (Series 5)[128][129] 6th generation (SE 1st gen)[13] 6th generation (Series 6)[14] 7th generation (Series 7)[130] 8th generation (SE 2nd gen)[131] 8th generation (Series 8)[132] 8th generation (Ultra)[133]
System on chip (SoC)[123] Apple S1[16] Apple S1P[79] Apple S2[79] Apple S3[10][123] Apple S4[123] Apple S5[129] Apple S6 Apple S7 Apple S8
Resistance Water[123] IPX7 splash resistant (up to 1 meter)[16][79] ISO 22810:2010 water resistant (up to 50 meters)[10][79][129] ISO 22810 water resistant (up to 100 meters) and dive (up to 40 meters)
Dust — IP6X dust resistant[134] — IP6X dust resistant
Connectivity Cellular (LTE / UMTS)[123] No[16][123][79] Optional (eSIM)[10][123][129] Standard (eSIM)
Wireless networking[123] Wi-Fi (802.11 b/g/n 2.4 GHz)[16][10][79][129] Wi-Fi (802.11 b/g/n 2.4 GHz & 5 GHz) Wi-Fi (802.11 b/g/n 2.4 GHz) Wi-Fi (802.11 b/g/n 2.4 GHz & 5 GHz)
Bluetooth[123] Bluetooth 4.0[16][123][79] Bluetooth 4.2[10][123] Bluetooth 5.0[123][129] Bluetooth 5.3[135]
Ultra Wideband No U1 chip[136] No U1 chip
Sensors Optical heart sensor[123] 1st generation[16][79][10][123] 2nd generation[128][13] 3rd generation[14][130] 2nd generation 3rd generation
Electrical heart sensor (ECG/EKG)[123] No[123] Yes[123][129] No Yes No Yes
Blood oxygen sensor[123] No[123] Yes[123][129] No Yes
Temperature sensor No Yes
Satellite Navigation[123] No[16][79] GPS and GLONASS[79] GPS, GLONASS, Galileo, and QZSS[10][123] GPS, GLONASS, Galileo, QZSS, and BeiDou[104] GPS, GLONASS, Galileo, and QZSS GPS, GLONASS, Galileo, QZSS, and BeiDou
Accelerometer[123] 16g[16][79][10][123] 32g[123][129] High-g[135]
Gyroscope[123] Yes[16][79][10][123] Improved[123][129] High dynamic range
Ambient light sensor[123] Yes[16][79][10][123][129]
Altimeter[123] No[16][79] Yes[10][123][129] Always on[10][123][129]
Compass No Yes[128]
Input & Display "Siri Speaks" and "Raise to Speak"[137] No Yes
Display type[123] OLED Retina[16][79] Second-generation OLED Retina[79][10][123] LTPO[138] OLED Retina[123] LTPO OLED Always-on Retina[129] LTPO[138] OLED Retina[123] LTPO OLED Always-on Retina[129] LTPO OLED Retina LTPO OLED Always-On Retina
Force Touch Yes No
Brightness (nits) 450[16][79] 1000[79][10][123][129] 2000
Pixel Density 326 ppi 338 ppi
Small (38/40/41 mm case height) diagonal size & resolution 38 mm: 1.337in
272×340 pixels[139]		 40 mm: 1.549in
324×394 pixels[139][i]		 41 mm: 1.691in
352×430 pixels[139][i]		 40 mm: 1.549in
324×394 pixels[139][i]		 41 mm: 1.691in
352×430 pixels[139][i]		 49 mm: 1.919 in
410×502 pixels[i]
Large (42/44/45 mm case height) diagonal size & resolution 42 mm: 1.533in
312×390 pixels[139]		 44 mm: 1.757in
368×448 pixels[139][i]		 45 mm: 1.901in
396×484 pixels[139][i]		 44 mm: 1.757in
368×448 pixels[139][i]		 45 mm: 1.901in
396×484 pixels[139][i]
Chipset Central Processing Unit (CPU) 520 MHz 32-bit Single-Core[5] 520 MHz 32-bit Dual-Core[140] 32-bit Dual-Core[123] 64-bit Dual-Core S4 SiP[11] 64-bit Dual-Core S5 SiP[128][13] 64-bit Dual-Core S6 SiP[14] 64-bit Dual-Core S7 SiP[130] 64-bit Dual-Core S8 SiP
Storage 8 GB[5][123] Non-LTE: 8 GB[123]
LTE: 16 GB[123]		 16 GB[123] 32 GB[129]
Random Access Memory (RAM) 512 MB DRAM[5][4] 768 MB DRAM[141] 1 GB DRAM[6][142] 1.5 GB DRAM[7]
Software OS Versions watchOS 1.0 to 4.3.2[16] watchOS 3.0 to 6.3[143] watchOS 4.0 to 8.7.1[115] watchOS 5.0 to 9.0[144] watchOS 6.0 to 9.0[144] watchOS 7.0 to 9.0[144] watchOS 8.0 to 9.0[144] watchOS 9.0
Requires[ii] iPhone 5 or later running iOS 8.2 or later[16] iPhone 5 or later running iOS 10 or later[145] Non-LTE: iPhone 5S or later running iOS 11 or later[10]
LTE: iPhone 6 or later, running iOS 11 or later[10]		 Non-LTE: iPhone 5S or later running iOS 12 or later[11]
LTE: iPhone 6 or later, running iOS 12 or later[123]		 iPhone 6s or later, running iOS 13 or later iPhone 6s or later with iOS 14 or later iPhone 6s or later with iOS 15 iPhone 8 or later running iOS 16
Battery Small case (38/40/41 mm) capacity 205 mA·h, 3.8 V, 0.78 W·h[146] 273 mA·h, 3.77 V, 1.03 W·h[147] Non-LTE: 262 mA·h, 3.81 V, 1.00 W·h[148] 224.9 mA·h, 3.81 V, 0.858 W·h[149] 245 mA·h, 3.85 V, 0.944 W·h[149] 245 mA·h, 3.85 V, 0.944 W·h[150] 265.9 mA·h, 3.85 V, 1.024 W·h[151] 284.2 mA·h, 3.85 V, 1.094 W·h[152] 542 mA·h, 3.86 V, 2.094 W·h[153]
LTE: 279 mA·h, 3.82 V, 1.07 W·h[154]
Large case (42/44/45 mm) capacity 246 mA·h, 3.78 V, 0.93 W·h[146] 334 mA·h, 3.8 V, 1.27 W·h[155] Non-LTE: 342 mA·h, 3.82 V, 1.31 W·h[156] 291.8 mA·h, 3.81 V, 1.113 W·h[157] 296 mA·h, 3.814 V, 1.129 W·h[158] 296 mA·h, 3.814 V, 1.129 W·h[159] 303.8 mA·h, 3.85 V, 1.17 W·h[151] 308.8 mA·h, 3.85 V, 1.189 W·h[152]
LTE: 352 mA·h, 3.82 V, 1.34 W·h[160]
Charge Times - - - ~1.5 hours to 80%

~2 hours to 100%[161]

 ~1.5 hours to 80%

~2 hours to 100%[162]

 ~1.5 hours to 80%

~2.5 hours to 100%[161]

 ~1.5 hours to 80%

~2.5 hours to 100%

~1 hour to 80%

~1.5 hours to 100%[163]

 ~45 minutes to 80%

~75 minutes to 100%[164]

 ~1.5 hours to 80%

~2.5 hours to 100%

~45 minutes to 80%

~75 minutes to 100%

~1 hour to 80%

~1.5 hours to 100%

Greenhouse Gas Emissions 50 kg CO2e[165] 20 kg CO2e[166] 30 kg CO2e[167] Non-LTE: 28 kg CO2e[168]

LTE: 36 kg CO2e[169]

 Non-LTE: 38 kg CO2e[170]

LTE: 39 kg CO2e[171]

 All: 40 kg CO2e[172] All: 35 kg CO2e[173] All: 36 kg CO2e[174] All: 34 kg CO2e[175] All: 31 kg CO2e[176] All: 33 kg CO2e[177] 56 kg CO2e[178]
Dates Introduced September 9, 2014 September 7, 2016 September 12, 2017 September 12, 2018 September 10, 2019 September 15, 2020 September 14, 2021 September 7, 2022
Released April 24, 2015 September 12, 2016 September 16, 2016 September 22, 2017 September 21, 2018 September 25, 2019 September 18, 2020 October 15, 2021 September 16, 2022 September 23, 2022
Discontinued September 7, 2016 September 12, 2018 September 12, 2017 September 7, 2022 September 10, 2019 September 15, 2020 September 7, 2022 October 8, 2021[179] September 7, 2022 In production
Unsupported September 17, 2018 December 14, 2020 September 12, 2022 Current
Model Numbers[180] A1553 (38 mm) A1554 (42 mm) A1802 (38 mm) A1803 (42 mm) A1757 (38 mm) A1758 (42 mm)
Edition: A1816 (38 mm) A1817 (42 mm) 		GPS: A1858 (38 mm) A1859 (42 mm)
GPS + Cellular:
Americas: A1860 (38 mm) A1861 (42 mm)

Europe and Asia Pacific: A1889 (38 mm) A1891 (42 mm)

China mainland: A1890 (38 mm) A1892 (42 mm)

GPS: A1977 (40 mm) A1978 (44 mm)
GPS + Cellular:
North America: A1975 (40 mm) A1976 (44 mm)
Europe, Asia Pacific, and China mainland: A2007 (40 mm) A2008 (44 mm) 		GPS: A2092 (40 mm) A2093 (44 mm)
GPS + Cellular:
North America: A2094 (40 mm) A2095 (44 mm)
Europe, Asia Pacific, and China mainland: A2156 (40 mm) A2157 (44 mm) 		GPS: A2351 (40 mm) A2352 (44 mm)

GPS + Cellular: North America: A2353 (40 mm) A2354 (44 mm)
Europe, Asia Pacific, and China mainland: A2355 (40 mm) A2356 (44 mm)

GPS: A2291 (40 mm) A2292 (44 mm)
GPS + Cellular:
North America: A2293 (40 mm) A2294 (44 mm)

Europe, Asia Pacific, and China mainland: A2375 (40 mm) A2376 (44 mm)

GPS: A2473 (41 mm) A2474 (45 mm)
GPS + Cellular:
North America: A2475 (41 mm) A2477 (45 mm)

Europe, Asia Pacific, and China mainland: A2476 (41 mm) A2478 (45 mm)

GPS: A2722 (40 mm) A2723 (44 mm)

GPS + Cellular: North America: A2726 (40 mm) A2727 (44 mm)
Europe and Asia Pacific: A2725 (40 mm) A2724 (44 mm)
China mainland: A2855 (40 mm) A2856 (44 mm)

GPS: A2770 (41 mm) A2771 (45 mm)

GPS + Cellular: North America: A2772 (41 mm) A2774 (45 mm)
Europe and Asia Pacific: A2773 (41 mm) A2775 (45 mm)
China mainland: A2857 (41 mm) A2858 (45 mm)

North America: A2622
Europe and Asia Pacific: A2684
China mainland: A2859
FCC ID BCG-E2870[181] BCG-E2871[182] BCG-E3102[183] BCG-E3103[184] BCG-E3104[185] BCG-E3105[186] BCG-A1858[187] BCG-A1859[188] BCG-A1860[189] BCG-A1861[190] BCG-A1889[191] BCG-A1891[192] BCG-A1890[193] BCG-A1892[194] BCG-A1977[195] BCG-A1978[196] BCG-A1975[197] BCG-A1976[198] BCG-A2007[199] BCG-A2008[200] BCG-A2092[201] BCG-A2093[202] BCG-A2094[203] BCG-A2095[204] BCG-A2156[205] BCG-A2157[206] BCG-A2351[207] BCG-A2352[208] BCG-A2353[209] BCG-A2354[210] BCG-A2355[211] BCG-A2356[212] BCG-A2291[213] BCG-A2292[214] BCG-A2293[215] BCG-A2294[216] BCG-A2375[217] BCG-A2376[218]
Starting price (US)
small / large 		Base model (Aluminum) $349 / $399[219] $269[220] $369[220] GPS: $329 / 359
GPS+Cellular: $399[221]		 GPS: $399 / $429
GPS+Cellular: $499 / $529[222][223][224]		 GPS: $279 / $309
GPS+Cellular: $329 / $359[225]		 GPS: $399 / $429
GPS+Cellular: $499 / $529 		GPS: $249 / $279
GPS+Cellular: $279 / $329 		GPS: $399 / $429
GPS+Cellular: $499 / $529 		—
Stainless steel $549 / $599[219] — $549 $749 / $799[226] $699 / $749[222][224] — $699 / $749 — $699 / $749
Nike+ — $369[220] GPS: $329[221] $399[223][224] $279 $399 —
Hermes $1,149[220] $1,149[221] $1,249[223][224] — $1,229 $1,229
Edition $10,000 / $12,000[227] $1,249 / $1,299[228] $1,299 / $1,349[226] —[222] $799 (Ti)[224]
$1,299 (Ceramic)[229]		 $799 —
Titanium — $799
Physical specifications
Series Small Large
Al[iii] SS[iv] Ed.[v] Img Al SS Ed. Img
1st gen.[124][16][125] H 38.6 mm (1.52 in)   42.0 mm (1.65 in)  
W 33.3 mm (1.31 in) 35.9 mm (1.41 in)
D 10.5 mm (0.41 in) 10.5 mm (0.41 in)
Weight 25 g (0.88 oz) 40 g (1.4 oz) 54–55 g (1.9–1.9 oz) 30 g (1.1 oz) 50 g (1.8 oz) 67–69 g (2.4–2.4 oz)
1[126] H 38.6 mm (1.52 in) — 42.5 mm (1.67 in) —
W 33.3 mm (1.31 in) — 36.4 mm (1.43 in) —
D 10.5 mm (0.41 in) — 10.5 mm (0.41 in) —
Weight 25 g (0.88 oz) — 30 g (1.1 oz) —
2[17] H 38.6 mm (1.52 in) 39.2 mm (1.54 in) 42.5 mm (1.67 in) 42.6 mm (1.68 in)
W 33.3 mm (1.31 in) 34.0 mm (1.34 in) 36.4 mm (1.43 in) 36.5 mm (1.44 in)
D 11.4 mm (0.45 in) 11.8 mm (0.46 in) 11.4 mm (0.45 in) 11.8 mm (0.46 in)
Weight 28.2 g (0.99 oz) 41.9 g (1.48 oz) 39.6 g (1.40 oz) 34.2 g (1.21 oz) 52.4 g (1.85 oz) 45.6 g (1.61 oz)
3[10] H 38.6 mm (1.52 in) 39.2 mm (1.54 in) 42.5 mm (1.67 in) 42.6 mm (1.68 in)
W 33.3 mm (1.31 in) 34.0 mm (1.34 in) 36.4 mm (1.43 in) 36.5 mm (1.44 in)
D 11.4 mm (0.45 in) 11.8 mm (0.46 in) 11.4 mm (0.45 in) 11.8 mm (0.46 in)
Weight 26.7–28.7 g (0.94–1.01 oz) 42.4 g (1.50 oz) 40.1 g (1.41 oz) 32.3–34.9 g (1.14–1.23 oz) 52.8 g (1.86 oz) 46.4 g (1.64 oz)
4[11] H 40 mm (1.6 in) —   44 mm (1.7 in) —  
W 34 mm (1.3 in) — 38 mm (1.5 in) —
D 10.7 mm (0.42 in) — 10.7 mm (0.42 in) —
Weight 30.1 g (1.06 oz) 39.8 g (1.40 oz) — 36.7 g (1.29 oz) 47.9 g (1.69 oz) —
5[128] H 40 mm (1.6 in) 44 mm (1.7 in)
W 34 mm (1.3 in) 38 mm (1.5 in)
D 10.74 mm (0.423 in) 10.74 mm (0.423 in)
Weight 30.8 g (1.09 oz) 40.6 g (1.43 oz) 35.1 / 39.7 g (1.24 / 1.40 oz) Ti/C 36.5 g (1.29 oz) 47.8 g (1.69 oz) 41.7 / 46.7 g (1.47 / 1.65 oz) Ti/C
SE (1st gen)[13] H 40 mm (1.6 in) — 44 mm (1.7 in) —
W 34 mm (1.3 in) — 38 mm (1.5 in) —
D 10.7 mm (0.42 in) — 10.7 mm (0.42 in) —
Weight 30.49–30.68 g (1.076–1.082 oz) — 36.20–36.36 g (1.277–1.283 oz) —
6[14] H 40 mm (1.6 in) 44 mm (1.7 in)
W 34 mm (1.3 in) 38 mm (1.5 in)
D 10.7 mm (0.42 in) 10.7 mm (0.42 in)
Weight 30.5 g (1.08 oz) 39.7 g (1.40 oz) 34.6 g (1.22 oz) 36.5 g (1.29 oz) 47.1 g (1.66 oz) 41.3 g (1.46 oz)
7[130] H 41 mm (1.6 in)   45 mm (1.8 in)  
W 35 mm (1.4 in) 38 mm (1.5 in)
D 10.74 mm (0.423 in) 10.74 mm (0.423 in)
Weight 32.0 g (1.13 oz) 42.3 g (1.49 oz) 37.0 g (1.31 oz) 38.8 g (1.37 oz) 51.5 g (1.82 oz) 45.1 g (1.59 oz)
SE (2nd gen) H 40 mm (1.6 in) –   44 mm (1.7 in) –  
W 34 mm (1.3 in) – 38 mm (1.5 in) –
D 10.7 mm (0.42 in) – 10.7 mm (0.42 in) –
Weight 26.4–27.8 g (0.93–0.98 oz) – 32.9–33.0 g (1.16–1.16 oz) –
8 H 41 mm (1.6 in) –   45 mm (1.8 in) –  
W 35 mm (1.4 in) – 38 mm (1.5 in) –
D 10.74 mm (0.423 in) – 10.74 mm (0.423 in) –
Weight 32.0 g (1.13 oz) 42.3 g (1.49 oz) – 38.8 g (1.37 oz) 51.5 g (1.82 oz) –
Ultra H   49 mm (1.9 in)  
W 44 mm (1.7 in)
D 14.4 mm (0.57 in)
Weight 61.3 g (2.16 oz)
  1. ^ a b c d e f g h i Viewable area reduced by rounded corners
  2. ^ At time of original release.
  3. ^ Watch with aluminum body
  4. ^ Watch with stainless steel body
  5. ^ "Edition" collection with 18K gold (1st gen), ceramic (Series 2/3/5), or titanium (Series 5/6/7) body

Collections and materials

Collections and materials[180]
Series Watch Nike+ Hermès Edition
1st Gen Body "Sport": Aluminum
(Silver, Space Gray, Rose Gold, Gold)[124]		 Stainless steel
(Polished or Space Black)[16]		 N/A Stainless steel
(Polished) 		18K Gold
(Rose or Yellow)[125]
Crystal "Sport": Ion-X[124] Sapphire[16] Sapphire Sapphire[125]
Back "Sport": Composite[124] Ceramic[16] Ceramic with Hermès logo Ceramic[125]
1 Body Aluminum
(Space Gray, Gold, Rose Gold, Silver) 		N/A
Crystal Ion-X
Back Composite
2 Body Aluminum
(Space Gray, Gold, Rose Gold, Silver) 		Stainless steel
(Space Black, Polished) 		Aluminum
(Space Gray, Silver) 		Stainless steel
(Polished) 		Ceramic
(White)
Crystal Ion-X Sapphire Ion-X Sapphire
Back Ceramic Ceramic Ceramic with Hermès logo Ceramic
3 Body Aluminum
(Space Gray, Gold, Silver) 		Stainless steel
(Space Black, Polished) 		Aluminum
(Space Gray, Silver) 		Stainless steel
(Polished) 		Ceramic
(White, Gray)
Crystal Ion-X Sapphire Ion-X Sapphire
Back Composite (GPS) Ceramic Composite (GPS) with Nike logo Ceramic with Hermès logo Ceramic
Ceramic (GPS+LTE) Ceramic (GPS+LTE) with Nike Logo
4 Body Aluminum
(Space Gray, Gold, Silver) 		Stainless steel
(Polished, Space Black, Gold) 		Aluminum
(Space Gray, Silver) 		Stainless steel
(Polished) 		N/A
Crystal Ion-X Sapphire Ion-X Sapphire
Back Ceramic Ceramic with Nike logo Ceramic with Hermès logo
5 Body Aluminum
(Space Gray, Gold, Silver) 		Stainless steel
(Polished, Space Black, Gold) 		Aluminum
(Space Gray, Silver) 		Stainless steel
(Polished, Space Black) 		Titanium
(Dark, Light) 		Ceramic
(White)
Crystal Ion-X Sapphire Ion-X Sapphire
Back Ceramic Ceramic with Nike logo Ceramic with Hermès logo Ceramic
SE (1st gen) Body Aluminum
(Space Gray, Gold, Silver) 		Aluminum
(Space Gray, Silver) 		N/A
Crystal Ion-X Ion-X
Back Ceramic Ceramic with Nike logo
6 Body Aluminum
(Space Gray, Gold, Silver, Red, Blue) 		Stainless steel
(Silver, Graphite, Gold) 		Aluminum
(Space Gray, Silver) 		Stainless steel
(Silver, Space Black) 		Titanium
(Natural, Space Black)
Crystal Ion-X Sapphire Ion-X Sapphire
Back Ceramic Ceramic with Nike logo Ceramic with Hermès logo Ceramic
7 Body Aluminum
(Midnight, Starlight, Green, Blue, (PRODUCT)RED) 		Stainless steel
(Silver, Graphite, Gold) 		Aluminum
(Midnight, Starlight) 		Stainless steel
(Silver, Space Black) 		Titanium
(Natural, Space Black)
Crystal Ion-X Sapphire Ion-X Sapphire
Back Ceramic Ceramic with Nike logo Ceramic with Hermès logo Ceramic
SE (2nd gen) Body Aluminum
(Midnight, Starlight, Silver) 		N/A
Crystal Ion-X
Back Composite
8 Body Aluminum
(Midnight, Starlight, Silver, (PRODUCT)RED) 		Stainless steel
(Silver, Graphite, Gold) 		N/A Stainless steel
(Silver, Space Black) 		N/A
Crystal Ion-X Sapphire Sapphire
Back Ceramic Ceramic with Hermès logo
Ultra Body Titanium N/A
Crystal Sapphire
Back Ceramic and sapphire
  • 1st generation only: Apple Watch was sold as "Apple Watch Sport" (Aluminum body) and "Apple Watch" (Stainless steel body). Later generations sold both body materials as "Apple Watch".

Reception

 
An Apple Store opens its doors on the first day of sales of the Apple Watch.

Following the announcement, initial impressions from technology and watch industry observers were varied; the watch was praised by some for its "design, potential capabilities and eventual usefulness",[230] while others offered criticism of these same aspects.[230] Venture capitalist Marc Andreessen said he "can't wait" to try it,[231] and Steve Jobs' biographer Walter Isaacson described it as "extremely cool" and an example of future technology that is "much more embedded into our lives".[232] Evan Dashevsky of PC Magazine said it offered nothing new in terms of functionality compared to the Moto 360, except the customizable vibration notifications.[233] In November 2014, Apple Watch was listed by Time as one of the 25 Best Inventions of 2014.[234]

Initial reviews for the device have been generally positive with some caveats.[235] Reviewers praised the watch's potential ability to integrate into everyday life and the overall design of the product, but noted issues of speed and price. Many reviewers described the watch as functional and convenient, while also noting failure to offer as much potential functionality as preceding smartphones. Farhad Manjoo of The New York Times mentioned the device's steep learning curve, stating it took him "three long, often confusing and frustrating days" to become accustomed to watchOS 1, but loved it thereafter.[236] Some reviewers also compared it to competing products, such as Android Wear devices, and claimed "The Smartwatch Finally Makes Sense".[237] Reviewers had mixed opinions on battery life though, with Geoffrey Fowler of The Wall Street Journal saying "the battery lives up to its all-day billing, but sometimes just barely,"[237] and others compared it to the Samsung Gear 2, which "strolls through three days of moderate usage."[238] Tim Bradshaw of the Financial Times used several applications over a period of days. He concluded that there is no "killer application" so far besides telling the time, which is the basic function of a wristwatch anyhow.[239]

When using the Apple Watch, some users have reported issues using the heart monitoring feature due to permanent skin conditions, including tattoos. The Watch uses photoplethysmography technology (PPG) that utilizes the green LED lights to measure heart rates.[240][241] To gauge a user's heart rate, the watch flashes green light from the LEDs at the skin and records the amount of this light that is absorbed by the red pigment of the blood.[242] Under certain circumstances, the skin may not allow for the light absorption to be read properly and thus provide inaccurate results.[243]

Some users have complained that the logo and text on the back of the Apple Watch Sport model, primarily the space gray version,[244] can be easily worn off.[245]

Sales

 
Apple Watch Series 5

Financial analysts offered early sales estimates from a few million to as many as 5 million in the first year.[246] Time's Tim Bajarin summarized the breadth of reactions, writing that "there is not enough information yet to determine how this product will fare when it finally reaches the market next year".[230]

Owing to the inadequacy of materials, the Apple Watch's delivery was delayed from its initial pre-order release date of April 10, 2015.[247] As a result, only 22 percent of the pre-ordered Apple Watches were dispatched in the United States during the weekend after the release date.[248] It is estimated Apple received almost one million Apple Watch pre-orders in the United States during the initial six hours of the pre-order period on April 10, 2015, after which it sold out and further orders would start delivering in June.[249] A report later on by an analyst stated that Apple Watch was already a $10 billion business during its first year.[250]

Apple has not disclosed any sales figures for the Apple Watch.[251] An estimate by IDC states Apple shipped over 12 million units in 2015.[252] In late 2016, a veteran of the Swiss watch industry said Apple sold about 20 million watches and had a market share of about 50 percent.[253] Analysts estimate Apple sold 18 million watches in 2017, 31 million in 2019, and 34 million in 2020.[254] In 2021, analysts estimated there were 100 million units in use.[255]

In 2020, Apple sold more watches than the entire Swiss watch industry– which includes Swatch and TAG Heuer among others. [256]

Controversies

In December 2019, Joseph Wiesel, a New York University cardiologist, sued Apple over allegations that the Apple Watch violates a patented method for detecting atrial fibrillation. Wiesel stated he had shared details of the patent with Apple in September 2017; the company refused to negotiate.[257]

Following Apple's announcement of the Series 7, an independent software development company filed a lawsuit against Apple alleging inappropriate copying of the software keyboard functionality from an app that Apple had previously rejected from its App Store.[258]

See also

Notes

  1. ^ In September 2016, the second generation of Apple Watch was divided into two Series, the Series 2 and the budget Series 1, with different internal components.[23] In September 2020, the sixth generation of Apple Watch was divided into the Series 6 and the budget SE, also carrying different internal components.[24] In September 2022, the eighth generation of Apple Watch was divided into the Series 8, the updated second generation of the budget SE, and the Ultra, again each with different internal components, and also with different external appearances.[25]
    For convenience sake, this article treats each SE generation and the Ultra as the equivalent of a numbered Series.
  2. ^ Except for the initial configuration, a "Family Setup" option removes the need for an iPhone altogether, although fewer features are supported.[30][31]

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February 09, 2023
apple, watch, line, smartwatches, produced, apple, incorporates, fitness, tracking, health, oriented, capabilities, wireless, telecommunication, integrates, with, other, apple, products, services, released, april, 2015, quickly, became, best, selling, wearable. Apple Watch is a line of smartwatches produced by Apple Inc It incorporates fitness tracking health oriented capabilities and wireless telecommunication and integrates with iOS and other Apple products and services The Apple Watch was released in April 2015 18 19 and quickly became the best selling wearable device 4 2 million were sold in the second quarter of fiscal 2015 20 and more than 100 million people were estimated to use an Apple Watch as of December 2020 21 Apple has introduced a new generation of the Apple Watch with improved internal components each September 22 each labeled by Apple as a Series with certain exceptions a Apple WatchApple Watch Series 1 in Space GrayDeveloperApple Inc ManufacturerQuanta Computer 1 Compal Electronics 2 contract manufacturer TypeSmartwatchRelease date1st generation April 24 2015 7 years ago 2015 04 24 Series 1 and Series 2 September 16 2016 6 years ago 2016 09 16 Series 3 September 22 2017 5 years ago 2017 09 22 Series 4 September 21 2018 4 years ago 2018 09 21 Series 5 September 20 2019 3 years ago 2019 09 20 Series 6 and SE 1st generation September 18 2020 2 years ago 2020 09 18 Series 7 October 15 2021 15 months ago 2021 10 15 Series 8 and SE 2nd generation September 16 2022 4 months ago 2022 09 16 Ultra September 23 2022 4 months ago 2022 09 23 Discontinued1st generation September 7 2016 6 years ago 2016 09 07 Series 1 September 21 2018 4 years ago 2018 09 21 Series 2 September 12 2017 5 years ago 2017 09 12 Series 3 September 7 2022 5 months ago 2022 09 07 Series 4 September 10 2019 3 years ago 2019 09 10 Series 5 September 15 2020 2 years ago 2020 09 15 Series 6 October 8 2021 16 months ago 2021 10 08 SE 1st generation and Series 7 September 7 2022 5 months ago 2022 09 07 Units sold100 million estimated 2020 3 Operating systemwatchOSSystem on a chip1st generation Apple S1Series 1 Apple S1PSeries 2 Apple S2Series 3 Apple S3Series 4 Apple S4Series 5 SE 1st generation Apple S5Series 6 Apple S6Series 7 Apple S7Series 8 SE 2nd generation Ultra Apple S8CPU1st generation 32 bit single coreSeries 1 Series 2 Series 3 32 bit dual coreSeries 4 onwards 64 bit dual coreMemory1st generation Series 1 Series 2 512 MB DRAM 4 Series 3 768 MB DRAM 5 4 Series 4 and Series 5 1 GB DRAM 6 Series 6 onwards 1 5 GB DRAM 7 Storage1st generation Series 1 Series 2 8 GB 8 5 9 Series 3 8 GB GPS or 16 GB Cellular 10 Series 4 16 GB 11 Series 5 onwards 32 GB 12 13 14 DisplayOLED 15 with strengthened Ion X glass or Sapphire glass 1st generation Series 1 Series 2 Series 3 38 mm33 96 mm 1 337 in diagonal 272 340 pixels 326 dpi42 mm38 94 mm 1 533 in diagonal 312 390 pixels 326 dpiSeries 4 Series 5 SE Series 6 40 mm39 34 mm 1 549 in diagonal 324 394 pixels 326 dpi44 mm44 63 mm 1 757 in diagonal 368 448 pixels 326 dpiSeries 7 Series 8 41 mm42 95 mm 1 691 in diagonal 352 430 pixels 326 dpi45 mm48 29 mm 1 901 in diagonal 396 484 pixels 326 dpiUltra 48 74 mm 1 919 in diagonal 410 502 pixels 338 dpi 1st generation Series 1 Series 2 Series 3 Series 4 Series 5 Force TouchConnectivityNFC Diagnostics port1st generation Series 1 Series 2 Bluetooth 4 0 16 17 Series 3 LTE cellular data optional Bluetooth 4 2 10 Series 4 Series 5 SE Series 6 Series 7 Series 8 LTE cellular data optional Bluetooth 5 11 12 13 14 Ultra LTE cellular data Bluetooth 5 31st generation Series 1 Series 2 Series 3 Series 4 Series 5 SE Wi Fi 802 11 b g n 2 4GHz only Series 6 Series 7 Series 8 Ultra Wi Fi 802 11 b g n 2 4GHz amp 5 GHz PowerBuilt in rechargeable Li Po batteryDimensions1st generation Series 1 38 mm38 6 mm 33 3 mm 10 5 mm 1 52 in 1 31 in 0 41 in 42 mm42 mm 35 9 mm 10 5 mm 1 65 in 1 41 in 0 41 in Series 2 Series 3 38 mm38 6 mm 33 3 mm 11 4 mm 1 52 in 1 31 in 0 45 in 42 mm42 5 mm 36 4 mm 11 4 mm 1 67 in 1 43 in 0 45 in Series 4 Series 5 SE Series 6 40 mm40 mm 34 mm 10 7 mm 1 57 in 1 34 in 0 42 in 44 mm44 mm 38 mm 10 7 mm 1 73 in 1 50 in 0 42 in Series 7 Series 8 41 mm41 mm 35 mm 10 7 mm 1 61 in 1 38 in 0 42 in 45 mm45 mm 38 mm 10 7 mm 1 77 in 1 50 in 0 42 in Ultra 49 mm 44 mm 14 4 mm 1 93 in 1 73 in 0 57 in BackwardcompatibilitywatchOS 1 3 iPhone 5 or laterwatchOS 4 5 iPhone 5S or later GPS Only iPhone 6 or later GPS Cellular watchOS 6 8 iPhone 6S or laterwatchOS 9 iPhone 8 or laterPredecessoriPod NanoWebsiteapple com watchEach Series has been initially sold in multiple variants defined by the watch casing s material color and size except for the budget watches Series 1 and SE available only in aluminum 23 26 and the Ultra available only in 49 mm uncolored titanium 25 and beginning with Series 3 by the option in the aluminum variants for LTE cellular connectivity which comes standard with the other materials 27 The band included with the watch can be selected from multiple options from Apple and watch variants in aluminum co branded with Nike and in stainless steel co branded with Hermes are also offered which include exclusive bands colors and digital watch faces carrying those companies branding 27 The Apple Watch operates in conjunction with the user s iPhone for functions such as configuring the watch and syncing data with iPhone apps but can separately connect to a Wi Fi network for data reliant purposes including communications app use and audio streaming 28 29 LTE equipped models can also perform these functions over a mobile network and can make and receive phone calls independently when the paired iPhone is not nearby or is powered off substantially reducing the need for an iPhone after initial setup b The oldest iPhone model that is compatible with any given Apple Watch depends on the version of system software installed on each device 32 As of September 2022 update new Apple Watches come with watchOS 9 preinstalled and require an iPhone running iOS 16 which is available for the iPhone 8 and later 33 Contents 1 Development 2 Unveiling and release 2 1 Release 3 Specifications 3 1 Design and materials 3 2 Size 3 3 Input and sensors 3 4 Battery 3 5 Bands 4 Hardware 4 1 First generation 4 2 Second generation Series 1 and 2 4 3 Third generation Series 3 4 4 Fourth generation Series 4 4 5 Fifth generation Series 5 amp SE 1st gen 4 6 Sixth generation Series 6 4 7 Seventh generation Series 7 4 8 Eighth generation Series 8 SE 2nd gen amp Ultra 5 Software 5 1 Version history 5 2 Third party apps 6 Models 7 Comparison of models 7 1 Support 7 2 Specifications 7 3 Collections and materials 8 Reception 8 1 Sales 9 Controversies 10 See also 11 Notes 12 References 13 External linksDevelopment EditThe goal of the Apple Watch was to complement an iPhone and add new functions and to free people from their phones 34 Kevin Lynch was hired by the Apple to make wearable technology for the wrist He said People are carrying their phones with them and looking at the screen so much People want that level of engagement But how do we provide it in a way that s a little more human a little more at the moment when you re with somebody 34 Apple s development process was held under wraps until a Wired article revealed how some internal design decisions were made 34 Rumors as far back as 2011 speculated that Apple was developing a wearable variation of the iPod that would curve around the user s wrist and feature Siri integration 35 In February 2013 The New York Times and The Wall Street Journal reported that Apple was beginning to develop an iOS based smartwatch with a curved display 36 That same month Bloomberg reported that Apple s smartwatch project was beyond the experimentation phase with a team of about 100 designers 37 In July 2013 Financial Times reported that Apple had begun hiring more employees to work on the smartwatch and that it was targeting a retail release in late 2014 38 Unveiling and release EditIn April 2014 Apple CEO Tim Cook told The Wall Street Journal that the company was planning to launch new products that year but revealed no specifics 39 In June 2014 Reuters reported that production was expected to begin in July for an October release 40 During a September 2014 press event where the iPhone 6 was also presented the new watch product was introduced by Tim Cook After a video focusing on the design process Cook reappeared on stage wearing an Apple Watch 41 In comparison to other Apple products and competing smartwatches marketing of the Apple Watch promoted the device as a fashion accessory 42 Apple later focused on its health and fitness oriented features in an effort to compete with dedicated activity trackers The watchOS 3 added fitness tracking for wheelchair users social sharing in the Activity app and a Breathe app to facilitate mindfulness 43 The device was not branded as iWatch which would have put it in line with its product lines such as iPod iPhone and iPad In the United States the iWatch trademark is owned by OMG Electronics who was crowdfunding a device under the same name it is owned in the European Union by Irish firm Probendi 44 In July 2015 Probendi sued Apple Inc for trademark infringement arguing that through keyword advertising on the Google search engine it caused advertising for the Apple Watch to appear on search results pages when users searched for the trademarked term iWatch 45 Release Edit Pre orders for the Apple Watch began on April 10 2015 with the official release on April 24 46 Initially it was not available at the Apple Store customers could make appointments for demonstrations and fitting but the device was not in stock for walk in purchases and had to be reserved and ordered online CNET felt that this distribution model was designed to prevent Apple Store locations from having long line ups due to the high demand 47 48 The first ever retail store to display the Apple Watch to the public was Colette in Paris 49 Later on selected models were available in limited quantities at luxury boutiques and authorized resellers 50 On June 4 2015 Apple announced that it planned to stock Apple Watch models at its retail locations 48 On August 24 2015 Best Buy announced that it would begin stocking Apple Watch at its retail stores by the end of September 51 Both T Mobile US and Sprint also announced plans to offer Apple Watch through their retail stores 52 In September 2015 Apple launched a new subset of Apple Watch with a stainless steel body and leather band in collaboration with Hermes 53 The following year Apple launched another subset of Apple Watches in collaboration with Nike dubbed Apple Watch Nike Both subsets featured cosmetic customization but otherwise functioned like standard Apple Watches 54 Apple Watch went on sale in India in November 2015 55 The device also launched in Chile the Philippines Indonesia and South Africa 56 Specifications EditDesign and materials Edit Series 4 40 mm aluminum Space Gray color Each series of Apple Watch is offered in multiple variants distinguished by the casing s material color and size 57 with special bands and digital watch faces available for certain variants co branded with Nike and Hermes which are also sometimes accompanied by other unique extras like stainless steel charging pucks premium packaging and exclusive color basic bands 58 Originally at launch the Apple Watch was marketed as one of three collections designating the case material In order of increasing cost the collections were Apple Watch Sport Aluminium case Apple Watch Stainless steel case Apple Watch Edition Originally released as an 18kt gold casing with newer materials in later models Starting with Series 1 Series 2 Apple dropped the Sport moniker from the branding apart from the sport bands and the Apple Watch was available with either an aluminum lowest cost or stainless steel case Apple Watch Edition branding still exists but now refers to watch casings made from ceramic or titanium 59 Apple did not explicitly market the first generation Apple Watch as being waterproof stating that it can withstand splashes of water such as rain and hand washing but does not recommend submersion IPX7 Apple introduced a higher level of water resistance with the release of the Apple Watch Series 2 and the device was explicitly advertised as being suitable for swimming and surfing 60 The Series 7 also includes an IP6X certification for dust resistance Size Edit Since the introduction of the Apple Watch it has been available in two sizes primarily affecting screen resolution and area The smaller size at launch was 38 mm 1 5 in referring to the approximate height of the watch case the larger size was 42 mm 1 7 in Starting with Series 4 the two nominal sizes changed to 40 mm 1 6 in smaller and 44 mm 1 7 in larger 61 The nominal sizes changed again with the introduction of Series 7 41 mm 1 6 in smaller and 45 mm 1 8 in larger The overall shape and width of the watch has not changed significantly since its release so customizable bands and accessories are typically compatible with any Apple Watch of the same size class Bands that fit the smaller size class 38 mm 1 5 in 40 mm 1 6 in and 41 mm 1 6 in watches and larger size class 42 mm 1 7 in 44 mm 1 7 in and 45 mm 1 8 in watches are generally interchangeable within the class 62 The casing of the watch includes a mechanism to allow the user to change the straps without special tools Input and sensors Edit Underside of three Apple Watches showing the digital crown and updates to the back sensors L R Series 3 5 and 6 For input the Watch features a digital crown on one side which can be turned to scroll or zoom content on screen and pressed to return to the home screen Next to the crown on the same side of the watch is the Side Button which can be used to display recently used apps and access Apple Pay which is used for contactless payment 63 The Watch also prominently features a touchscreen prior to Series 6 SE the screen included Force Touch technology which enabled the display to become pressure sensitive and therefore capable of distinguishing between a tap and a press for displaying contextual menus 15 Force Touch has since been physically removed in Watch Series 6 and Watch SE 64 and has been disabled via software on Watch Series 5 and earlier on models supporting watchOS 7 65 Additional sensors integrated into the Watch include an accelerometer gyroscope and barometer which are used to determine device orientation user movement and altitude 66 The back of all Apple Watches are equipped with a Heart Rate Monitor which projects infrared and green light from light emitting diodes LEDs onto the user s skin and photodiodes measure the varying amount of light reflected Because blood absorbs green light and reflects red light the amounts of each type of reflected light are compared to determine heart rate The Watch adjusts the sampling rate and LED brightness as needed 66 Starting with the Series 4 Apple added electrical sensors to the Digital Crown and back allowing the Watch to take electrocardiogram ECG readings 67 the device won FDA clearance in October 2018 becoming the first consumer device capable of taking an ECG 68 A blood oxygen monitor was added with the Series 6 in 2020 albeit as a wellness device not capable of diagnosing a medical condition 69 The blood oxygen monitor added red LEDs to the back allowing the watch to determine oxygen levels by measuring blood color 70 The Watch SE reverted to the capabilities of the Series 3 dropping the electrical sensors and blood oxygen monitor 71 Battery Edit Apple rates the device s battery for 18 hours of mixed usage 15 72 Apple Watch is charged by means of inductive charging 18 If the watch s battery depletes to less than 10 percent the user is alerted and offered to enable Low Power Mode which allows the user to continually use the watch while some features are disabled The watch then reverts to its original mode when the battery is sufficiently charged 73 Bands Edit Apple Watch comes with an included band strap to attach it to the user s wrist The band can be easily changed to other types by holding down the connectors on the bottom of the watch and sliding the band pieces out Third party bands are compatible with Apple Watch Apple produces bands in a variety of materials and colours Bands designed for the original Series 1 3 38 mm and 42 mm case sizes are compatible with the Series 4 6 40 mm and 44 mm cases as well as the Series 7 41 mm and 45 mm cases respectively 74 Starting with Apple Watch Series 5 Apple introduced the online Apple Watch Studio which allows customers to mix and match bands on purchase eliminating the need to purchase a specific combination of case and band design and allows for a simplification of packaging since Apple Watch Series 4 in 2018 75 Hardware EditFirst generation Edit Apple S1 The 1st generation Apple Watch colloquially referred to as Series 0 uses the single core S1 system on chip It does not have a built in GPS chip instead relying on a paired iPhone for location services It features a new linear actuator hardware from Apple called the Taptic Engine providing realistic haptic feedback when an alert or a notification is received and is used for other purposes by certain apps 15 The watch is equipped with a built in heart rate sensor which uses both infrared and visible light LEDs and photodiodes 76 All versions of the first generation Apple Watch have 8 GB of storage the operating system allows the user to store up to 2 GB of music and 75 MB of photos When the Apple Watch is paired with an iPhone all music on that iPhone is also available to be controlled and accessed from the Apple Watch 77 Software support for the first Apple Watch ended with watchOS 4 3 2 78 Second generation Series 1 and 2 Edit Apple S2 The second generation Apple Watch has two models the Apple Watch Series 1 and Apple Watch Series 2 The Series 1 has a variant of the dual core Apple S2 processor with GPS removed known as the Apple S1P It has a lower starting price than first generation 79 The Series 1 was sold only in Aluminium casings The Series 2 has the dual core Apple S2 processor water resistance to 50 meters a display twice as bright at 1000 nits and a GPS receiver 79 60 The Series 2 was sold in casings of anodized Aluminium Stainless Steel and Ceramic The Apple Watch Edition Series 2 is the first Apple Watch model to add the new White ceramic case color option Both Yellow Gold and Rose Gold 18K gold case color options have been removed The Apple Watch Nike Series 2 is the first Apple Watch model available as the Nike Inc collaborate special option The Apple Watch Series 1 and Apple Watch Series 2 are the final Apple Watch models available with Yellow Gold and Rose Gold aluminum case color options They have an advertised 18 hours of battery life The software support for both Apple Watch Series 1 and Apple Watch Series 2 ended with watchOS 6 3 Third generation Series 3 Edit Apple S3 The Apple Watch Series 3 features a faster processor the dual core S3 Bluetooth 4 2 compared to 4 0 on older models a built in altimeter for measuring flights of stairs climbed increased RAM size and is available in a variant with LTE cellular connectivity Siri is able to speak through the onboard speaker on Apple Watch Series 3 due to the increased processing speed of the Watch 80 Series 3 features LTE cellular connectivity for the first time in an Apple Watch enabling users to make phone calls iMessage and stream Apple Music and Podcasts directly on the watch independent of an iPhone The LTE model contains an eSIM 81 and shares the same mobile number as the user s iPhone 82 The Apple Watch Series 3 is the first Apple Watch model to add the new Gold aluminum case color option to match the color introduced with the iPhone 8 in 2017 Both Yellow Gold and Rose Gold aluminum case color options have been removed It is now available in Space Gray Silver and Gold aluminum case color options available in Space Black and Silver stainless steel case color options The Apple Watch Edition Series 3 is the first and only Apple Watch model to add the new Gray ceramic case color option It is available in White and Gray ceramic case color The software support for the Apple Watch Series 3 ended with watchOS 8 7 1 Fourth generation Series 4 Edit Apple Watch Series 4 The Apple Watch Series 4 83 is the first predominant redesign of the Apple Watch featuring larger displays with thinner bezels and rounded corners and a slightly rounder thinner chassis with a redesigned ceramic back Internally there is a new S4 64 bit dual core processor capable of up to double the S3 s performance upgraded 16 GB storage and a new electrical heart sensor The microphone was moved to the opposite side between the side button and the digital crown to improve call quality Other changes include the digital crown incorporating haptic feedback with the Apple Haptic Engine and includes the new Apple designed W3 wireless chip The ECG system has received clearance from the United States Food and Drug Administration a first ever for a consumer device 84 and is supported by the American Heart Association 85 The Series 4 can also detect falls and can automatically contact emergency services unless the user cancels the outgoing call The watch received mostly positive reviews from critics TechRadar gave it a score of 4 5 5 calling it one of the top smartwatches while criticizing the short battery life 86 Digital Trends gave it a score of 5 5 calling it Apple s best product and praising the design build quality and software among others while criticizing the battery life 87 CNET gave it a score of 8 2 10 calling it the best overall smartwatch around while criticizing the battery life and lack of watch face options 88 T3 gave it a score of 5 5 calling it a truly next gen smartwatch due to its thinner body and bigger screen compared to the Series 3 and health features 89 The Apple Series 4 is the first Apple Watch model to add the new Gold stainless steel color option to match the color introduced with the iPhone XS in 2018 It is now available in Space Gray Silver and Gold aluminum case color options available in Space Black Silver and Gold stainless steel case color options All the ceramic case color options have been removed until the launch of the Apple Watch Edition Series 5 in 2019 Fifth generation Series 5 amp SE 1st gen Edit Apple S5 The Apple Watch Series 5 was announced on September 10 2019 90 Its principal improvements over its predecessor were the addition of a compass and an always on display with a low power display driver capable of refresh rates as low as once per second Additional new features include International Emergency Calling enabling emergency calls in over 150 countries a more energy efficient S5 processor 91 improved ambient light sensor and storage doubled to 32 GB The release of the Series 5 also brought back the Edition model with a ceramic model absent from the previous generation A new titanium model was also included in two colors natural and Space Black 92 At its September 2020 product introduction event Apple also announced the Apple Watch SE a lower cost model 93 The SE incorporates the same always on altimeter as the Series 6 94 but uses the previous generation S5 processor and previous i e second generation optical heart rate sensor does not include ECG and blood oximeter sensors or an always on display and does not include UWB or 5 GHz Wi Fi communication capabilities The Series 5 and above including the SE model introduced in 2020 also incorporate enhanced hardware and software based battery and performance management functionality 95 Critics generally gave it a positive review CNET gave it a score of 4 5 concluding The Apple Watch continues to be one of the best smartwatches but it remains limited by being an iPhone accessory for now 96 Digital Trends gave it a score of 4 5 5 97 The Verge gave it a score of 9 10 98 The Apple Watch Series 5 is now available in Space Gray Silver and Gold aluminum case color options available in Space Black Silver and Gold stainless steel case color options The Apple Watch Edition Series 5 is the final Apple Watch model available with White ceramic case color option It is the first Apple Watch model to add the new Natural and Space Black titanium case color options It is now available in White ceramic case color option available in Natural and Space Black titanium case color options The 1st generation Apple Watch SE is the final Apple Watch model available with Space Gray and Gold introduced with iPhone 8 in 2017 case color options It is now available with Space Gray Silver and Gold case color options Sixth generation Series 6 Edit Apple S6 The Apple Watch Series 6 was announced on September 15 2020 during an Apple Special Event and began shipping on September 18 Its principal improvement over its predecessor is the inclusion of a sensor to monitor blood oxygen saturation 99 Additional features include a new S6 processor that is up to 20 faster than the S4 and S5 93 a 2 5 brighter always on display and an always on altimeter 100 The S6 incorporates an updated third generation optical heart rate sensor and also enhanced telecommunication technology including support for ultra wideband UWB via Apple s U1 chip and the ability to connect to 5 GHz Wi Fi networks The Series 6 watch was updated with faster charging hardware such that it completes charging in 1 5 hours 101 Force Touch hardware was removed consistent with the removal of all Force Touch functionality from watchOS 7 The Apple Watch Series 6 is the final Apple Watch model available with Space Gray and Gold introduced with the iPhone 8 in 2017 aluminum case color options It is the first time adding the Product Red and Blue aluminum case color options It is available in Space Gray Silver Gold Blue and Product Red aluminum case color options available in Graphite Silver and Gold stainless steel case color options The Gold stainless steel case color option is now in classic yellow gold and the Graphite stainless steel case color option is the new color replacing Space Black color before introduced with the iPhone 12 Pro in 2020 The Apple Watch Edition Series 6 is now available in Natural and Space Black titanium case color options The ceramic case option was removed Seventh generation Series 7 Edit Apple S7 The Apple Watch Series 7 was announced on September 14 2021 during an Apple Special Event 102 Pre orders opened on October 8 with earliest shipping dates starting on October 15 Enhancements relative to the prior generation Series 6 watch include a more rounded design with a case 1 mm larger than the Series 6 a display that is 70 brighter indoors and approximately 20 larger improved durability via a crack resistant front crystal 103 IP6X certification for resistance to dust 33 faster charging via improved internal electronics and an enhanced USB C based fast charging cable support for BeiDou China s satellite navigation system and the availability of an on screen keyboard that can be tapped or swiped 104 The Series 7 is also equipped with new hardware that enables ultra rapid short range wireless data transfer at 60 5 GHz though Apple has not fully explained this new functionality 105 The Apple Watch Edition Series 7 is the final Apple Watch model to be available in Natural and Space Black titanium case color options The Apple Watch Series 7 is now available in Midnight Starlight Blue Green and Product Red aluminum case color option available in Graphite Silver and Gold introduced with Apple Watch Series 6 and iPhone 12 Pro in 2020 stainless steel case color option Both Space Gray and Gold introduced with iPhone 8 in 2017 aluminum case color options have been removed The Silver aluminum case color option was removed until the launch of the Apple Watch Series 8 in 2022 Eighth generation Series 8 SE 2nd gen amp Ultra Edit Apple S8 The Apple Watch Series 8 the second generation Apple Watch SE and Apple Watch Ultra were announced on September 7 2022 during an Apple Special Event 102 Pre orders opened on the same day with the Series 8 and 2nd gen SE shipping on September 16 while the Ultra ships on September 23 106 Enhancements in the Series 8 relative to the prior generation Series 7 watch include a new temperature sensor and more precise accelerometers and gyroscopes capable of detecting the occurrence of a car crash 107 Aluminum case models are available in Midnight Silver Starlight and Product Red and the stainless steel models are available in Silver Graphite and Gold The Blue and Green case colors are discontinued and the Series 8 is not available with a titanium case Apple Watch Ultra logo Apple Watch Ultra on wrist The Apple Watch Ultra is the first Apple Watch model to feature a new tough and rugged titanium casing in natural finish larger 49 mm case size flat sapphire front crystal and additional orange Action button located other side to both Digital Crown and Side Button It is designed for the extreme activities like endurance sports elite athletes trailblazing adventure ocean and water sports The 2nd generation Apple Watch SE is available in Midnight Silver and Starlight case color options The Space Gray and Gold case color options have been discontinued Software EditApple Watch runs watchOS whose interface is based around a home screen with circular app icons which can be changed to a list view in the devices settings The OS can be navigated using the touchscreen or the crown on the side of the watch 15 During its debut the first generation Apple Watch needed to be paired with an iPhone 5 or later running iOS 8 2 or later this version of iOS introduced the Apple Watch app which is used to pair the watch with an iPhone customize settings and loaded apps and highlight compatible apps from the App Store 15 The Apple Watch is capable of receiving notifications messages and phone calls via a paired iPhone 15 Glances allowed users to swipe between pages containing widget like displays of information however this feature was replaced by a new Control Center watchOS also supports Handoff to send content from Apple Watch to an iOS or macOS device 15 and act as a viewfinder for an iPhone camera 63 Siri is also available for voice commands and is capable of responding with voice prompts on the Series 3 watches 15 Apple Watch also supports Apple Pay and enables its use with older iPhone models that do not contain near field communication NFC support 15 Apple Watch s default apps are designed to interact with their iOS counterparts such as Mail Phone Calendar Messages Maps Music Photos Reminders Remote which can control iTunes and Apple TV Stocks and Wallet 15 Using the Activity and Workout apps a user can track their physical activity and send data back to the iPhone for use in its Health app and other HealthKit enabled software 15 With watchOS 3 Reminders Home Find My Friends Heart Rate and Breathe were added to the stock apps With the release of watchOS 4 and the Series 3 Apple Watch iPhone 5 and iPhone 5C support was dropped requiring users to use an iPhone 5S or later with iOS 11 or later to use watchOS 4 Apple Watches still running watchOS 3 or below remain compatible with the iPhone 5 and iPhone 5C Further watchOS 5 dropped support for the original Series 0 Apple Watch 108 watchOS 6 was the final version to support the Series 1 and Series 2 Apple Watch It dropped support for the iPhone 5S iPhone 6 and iPhone 6 Plus requiring users to use an iPhone 6S or later with iOS 13 or later watchOS 8 was the final version to support the Apple Watch Series 3 watchOS 9 dropped support for the Apple Watch Series 3 iPhone 6S iPhone 6S Plus first generation iPhone SE iPhone 7 and iPhone 7 Plus requiring users to use an iPhone 8 or later with iOS 16 or later paired with an Apple Watch SE Apple Watch Series 4 or later Version history Edit See also watchOS version history At WWDC 2015 Tim Cook announced watchOS 2 0 described by CNET as a significant revamp it included a new software development kit that allows more direct access to the device s hardware new watch faces the ability to reply to an e mail and other features 109 WatchOS 2 0 was released in September 2015 110 Following the software update some users experienced issues with lag 111 watchOS 3 0 was announced at WWDC 2016 with a priority on performance Users are able to keep apps running in memory as well as receive background updates and refreshed information Other updates include a new Dock invoked with the side button to replace the performance laden Glances an updated Control Center and new reply options on Messages Several new watch faces have also been added including Minnie Mouse along with the ability to switch watch faces from the lock screen simply by swiping A new feature called SOS allows users to hold the dock button to make a call to the local emergency line and pull up the user s Medical ID Another feature is Activity Sharing which allows sharing of workouts with friends and even sending their heartbeats to one another A new app called Breathe guides users through breathing exercises throughout the day with visuals and haptic feedback It was made available to the public in September 2016 watchOS 3 1 was released to the public in October 2016 and watchOS 3 2 was released in March 2017 112 Both updates added minor improvements and bug fixes WatchOS 4 0 was announced at WWDC 2017 and released to the public in September 2017 WatchOS 4 features a proactive Siri watch face personalized activity coaching and an entirely redesigned music app It also introduces Apple GymKit a technology platform to connect workouts with cardio equipment WatchOS 4 3 was released in March 2018 It introduced support for Nightstand mode in portrait orientation It brought back the ability for music playing on the iPhone to be controlled using the Music app on the Apple Watch and also enabled control of playback and volume on Apple s HomePod Other new features included a new charging animation and a new app loading animation Activity data was added to the Siri watch face and the battery complication more accurately reports battery life watchOS 5 0 was first shown to the public at the San Jose WWDC developer conference held by Apple It introduced an instant watch to watch walkie talkie mode all new Podcasts app raise wrist to speak Siri customizable Control Center and the ability to access the notification center and control center from apps Other features included support for WebKit to view web pages six new watch faces and new workout running features 113 It was released to the public in September 2018 114 On the newest release of watchOS beta the sleep feature was shown on screen this would eliminate the need to use third party apps watchOS 6 0 was released to the public in September 2019 It introduced more native iOS apps such as voice memos calculator and a native watchOS app store watchOS 6 0 also introduced new features such as the noise app that allows you to measure the sound around you in decibels menstrual tracking and new watch faces Other features include Siri being able to tell users what music they are listening to activity trends and a new UI framework for developers watchOS 7 0 was announced on June 22 2020 at the WWDC and released on September 16 2020 new functionalities include sleep tracking additional watch faces handwashing detection and new workouts such as dancing 115 watchOS 8 0 was announced on June 7 2021 at the WWDC and released on September 20 2021 It replaces the Breathe app with a new Mindfulness app and adds a Focus mode as well as a Portrait Watch Face updates to the Messages and Home apps Contacts and Find My apps and a redesigned Photos app watchOS 9 0 was released to public on September 13 2022 It enhances the Workout display with new views of metrics like Activity rings Heart Rate Zones Power and Elevation It also support better sleep tracking and additional watch faces Third party apps Edit In watchOS 1 third party WatchKit applications run in the background on the iPhone as an application extension while a set of native user interface resources are installed on Apple Watch 116 Thus watchOS apps must be bundled within their respective iOS app and are synced to the watch either manually or automatically upon installation of the phone app 15 With the release of watchOS 2 Apple made it mandatory for new watch apps to be developed with the watchOS 2 SDK from June 1 2016 onwards no third party languages or SDKs can be used to develop apps 117 This allowed for developers to create native apps that are run on the watch itself thus improving the responsiveness of third party apps In watchOS 5 and earlier all watchOS apps are dependent apps the watchOS app relies on an iOS companion app in order to function properly 118 In watchOS 6 or later developers are able to create completely independent watchOS apps and no longer require an app to be installed on the paired iPhone This was assisted by the introduction of a separate App Store on the Apple Watch itself 119 Models EditSee also List of iOS devices Apple Watch An Apple Store showcase with various Apple Watch models As of September 2021 eight generations and eight series of Apple Watch have been released Apple Watch models have been divided into five collections Apple Watch 1st generation present Apple Watch Sport 1st generation Apple Watch Nike Series 2 present Apple Watch Hermes 1st generation Series 5 Series 6 present and Apple Watch Edition 1st generation Series 3 Series 5 Series 6 present They are differentiated by combinations of cases bands and exclusive watch faces Apple Watch comes with either aluminum or stainless steel cases and various watch bands only stainless steel was offered for Apple Watch 1st generation Apple Watch Sport came with aluminum cases and sport bands or woven nylon bands Apple Watch Nike comes with aluminum cases and Nike sport bands or sport loops Apple Watch Hermes uses stainless steel cases and Hermes leather watch bands also included is an exclusive Hermes orange sport band and Apple Watch Edition came with ceramic cases and various bands the 1st generation Apple Watch Edition used 18 karat yellow or rose gold 120 With the Series 5 the Edition tier was expanded with a new titanium case Apple Watch Series 1 models were previously only available with aluminum cases and sport bands 121 As of Series 3 each Apple Watch model in aluminum the least expensive casing is available either with or without LTE cellular connectivity while the models with the other casing materials available stainless steel and sometimes ceramic and titanium always include it 30 122 Each model through Series 3 comes in a 38 or 42 millimeter body with the larger size having a slightly larger screen and battery 15 The Series 4 was updated to 40 and 44 millimeter models respectively The Series 7 has been updated to 41 and 45 millimeter models Each model has various color and band options Featured Apple made bands include colored sport bands sport loop woven nylon band classic buckle modern buckle leather loop Milanese loop and a link bracelet 15 Comparison of models EditLegend Vintage Discontinued and unsupported Discontinued but still supported Current or still soldSupport Edit Watch Released with Release date Discontinued Final supported OS Support ended Support lifespan1st generation watchOS 1 0 iOS 8 2 April 24 2015 7 years ago 2015 04 24 September 7 2016 6 years ago 2016 09 07 watchOS 4 3 2 iOS 11 4 1 A September 17 2018 4 years ago 2018 09 17 3 years 4 monthsSeries 1 watchOS 3 0 iOS 10 0 September 12 2016 6 years ago 2016 09 12 September 12 2018 4 years ago 2018 09 12 watchOS 6 3 iOS 13 7 B September 15 2020 2 years ago 2020 09 15 4 yearsSeries 2 watchOS 3 0 iOS 10 0 September 16 2016 6 years ago 2016 09 16 September 12 2017 5 years ago 2017 09 12 watchOS 6 3 iOS 13 7 September 15 2020 2 years ago 2020 09 15 3 years 11 monthsSeries 3 watchOS 4 0 iOS 11 0 September 22 2017 5 years ago 2017 09 22 September 7 2022 5 months ago 2022 09 07 watchOS 8 7 1 iOS 15 6 1 C September 13 2022 4 months ago 2022 09 13 4 years 11 monthsSeries 4 watchOS 5 0 iOS 12 0 September 21 2018 4 years ago 2018 09 21 September 10 2019 3 years ago 2019 09 10 watchOS 9 0 iOS 16 0 Current 4 years 4 months Series 5 watchOS 6 0 iOS 13 0 September 20 2019 3 years ago 2019 09 20 September 15 2020 2 years ago 2020 09 15 3 years 4 months SE 1st generation watchOS 7 0 iOS 14 0 September 18 2020 2 years ago 2020 09 18 September 7 2022 5 months ago 2022 09 07 2 years 4 months Series 6 watchOS 7 0 iOS 14 0 September 18 2020 2 years ago 2020 09 18 September 14 2021 16 months ago 2021 09 14 2 years 4 months Series 7 watchOS 8 0 iOS 15 0 October 15 2021 15 months ago 2021 10 15 September 7 2022 5 months ago 2022 09 07 1 year 3 months SE 2nd generation watchOS 9 0 iOS 16 0 September 16 2022 4 months ago 2022 09 16 In production 4 months Series 8 watchOS 9 0 iOS 16 0 September 16 2022 4 months ago 2022 09 16 In production 4 months Ultra watchOS 9 0 iOS 16 0 September 23 2022 4 months ago 2022 09 23 In production 4 months watch OS 4 3 2 requires iOS version 11 4 but higher version iOS can still pair with a watchOS 4 watch watch OS 6 3 requires iOS version 13 5 but iOS 14 can still pair with a watchOS 6 watch watch OS 8 7 1 requires iOS version 15 6 but iOS 16 can still pair with a watchOS 8 watch OS release ModelVintage Unsupported Vintage Unsupported Discontinued Current1st gen Series 1 Series 2 Series 3 Series 4 Series 5 SE 1st gen Series 6 Series 7 SE 2nd gen Series 8 UltrawatchOS 1 watchOS 2 watchOS 3 watchOS 4 watchOS 5 watchOS 6 watchOS 7 watchOS 8 watchOS 9 Specifications Edit Specification 123 1st generation 16 124 125 2nd generation Series 1 126 79 2nd generation Series 2 17 79 3rd generation Series 3 10 123 4th generation Series 4 11 127 5th generation Series 5 128 129 6th generation SE 1st gen 13 6th generation Series 6 14 7th generation Series 7 130 8th generation SE 2nd gen 131 8th generation Series 8 132 8th generation Ultra 133 System on chip SoC 123 Apple S1 16 Apple S1P 79 Apple S2 79 Apple S3 10 123 Apple S4 123 Apple S5 129 Apple S6 Apple S7 Apple S8Resistance Water 123 IPX7 splash resistant up to 1 meter 16 79 ISO 22810 2010 water resistant up to 50 meters 10 79 129 ISO 22810 water resistant up to 100 meters and dive up to 40 meters Dust IP6X dust resistant 134 IP6X dust resistantConnectivity Cellular LTE UMTS 123 No 16 123 79 Optional eSIM 10 123 129 Standard eSIM Wireless networking 123 Wi Fi 802 11 b g n 2 4 GHz 16 10 79 129 Wi Fi 802 11 b g n 2 4 GHz amp 5 GHz Wi Fi 802 11 b g n 2 4 GHz Wi Fi 802 11 b g n 2 4 GHz amp 5 GHz Bluetooth 123 Bluetooth 4 0 16 123 79 Bluetooth 4 2 10 123 Bluetooth 5 0 123 129 Bluetooth 5 3 135 Ultra Wideband No U1 chip 136 No U1 chipSensors Optical heart sensor 123 1st generation 16 79 10 123 2nd generation 128 13 3rd generation 14 130 2nd generation 3rd generationElectrical heart sensor ECG EKG 123 No 123 Yes 123 129 No Yes No YesBlood oxygen sensor 123 No 123 Yes 123 129 No YesTemperature sensor No YesSatellite Navigation 123 No 16 79 GPS and GLONASS 79 GPS GLONASS Galileo and QZSS 10 123 GPS GLONASS Galileo QZSS and BeiDou 104 GPS GLONASS Galileo and QZSS GPS GLONASS Galileo QZSS and BeiDouAccelerometer 123 16g 16 79 10 123 32g 123 129 High g 135 Gyroscope 123 Yes 16 79 10 123 Improved 123 129 High dynamic rangeAmbient light sensor 123 Yes 16 79 10 123 129 Altimeter 123 No 16 79 Yes 10 123 129 Always on 10 123 129 Compass No Yes 128 Input amp Display Siri Speaks and Raise to Speak 137 No YesDisplay type 123 OLED Retina 16 79 Second generation OLED Retina 79 10 123 LTPO 138 OLED Retina 123 LTPO OLED Always on Retina 129 LTPO 138 OLED Retina 123 LTPO OLED Always on Retina 129 LTPO OLED Retina LTPO OLED Always On RetinaForce Touch Yes NoBrightness nits 450 16 79 1000 79 10 123 129 2000Pixel Density 326 ppi 338 ppiSmall 38 40 41 mm case height diagonal size amp resolution 38 mm 1 337in272 340 pixels 139 40 mm 1 549in324 394 pixels 139 i 41 mm 1 691in352 430 pixels 139 i 40 mm 1 549in324 394 pixels 139 i 41 mm 1 691in352 430 pixels 139 i 49 mm 1 919 in410 502 pixels i Large 42 44 45 mm case height diagonal size amp resolution 42 mm 1 533in312 390 pixels 139 44 mm 1 757in368 448 pixels 139 i 45 mm 1 901in396 484 pixels 139 i 44 mm 1 757in368 448 pixels 139 i 45 mm 1 901in396 484 pixels 139 i Chipset Central Processing Unit CPU 520 MHz 32 bit Single Core 5 520 MHz 32 bit Dual Core 140 32 bit Dual Core 123 64 bit Dual Core S4 SiP 11 64 bit Dual Core S5 SiP 128 13 64 bit Dual Core S6 SiP 14 64 bit Dual Core S7 SiP 130 64 bit Dual Core S8 SiPStorage 8 GB 5 123 Non LTE 8 GB 123 LTE 16 GB 123 16 GB 123 32 GB 129 Random Access Memory RAM 512 MB DRAM 5 4 768 MB DRAM 141 1 GB DRAM 6 142 1 5 GB DRAM 7 Software OS Versions watchOS 1 0 to 4 3 2 16 watchOS 3 0 to 6 3 143 watchOS 4 0 to 8 7 1 115 watchOS 5 0 to 9 0 144 watchOS 6 0 to 9 0 144 watchOS 7 0 to 9 0 144 watchOS 8 0 to 9 0 144 watchOS 9 0Requires ii iPhone 5 or later running iOS 8 2 or later 16 iPhone 5 or later running iOS 10 or later 145 Non LTE iPhone 5S or later running iOS 11 or later 10 LTE iPhone 6 or later running iOS 11 or later 10 Non LTE iPhone 5S or later running iOS 12 or later 11 LTE iPhone 6 or later running iOS 12 or later 123 iPhone 6s or later running iOS 13 or later iPhone 6s or later with iOS 14 or later iPhone 6s or later with iOS 15 iPhone 8 or later running iOS 16Battery Small case 38 40 41 mm capacity 205 mA h 3 8 V 0 78 W h 146 273 mA h 3 77 V 1 03 W h 147 Non LTE 262 mA h 3 81 V 1 00 W h 148 224 9 mA h 3 81 V 0 858 W h 149 245 mA h 3 85 V 0 944 W h 149 245 mA h 3 85 V 0 944 W h 150 265 9 mA h 3 85 V 1 024 W h 151 284 2 mA h 3 85 V 1 094 W h 152 542 mA h 3 86 V 2 094 W h 153 LTE 279 mA h 3 82 V 1 07 W h 154 Large case 42 44 45 mm capacity 246 mA h 3 78 V 0 93 W h 146 334 mA h 3 8 V 1 27 W h 155 Non LTE 342 mA h 3 82 V 1 31 W h 156 291 8 mA h 3 81 V 1 113 W h 157 296 mA h 3 814 V 1 129 W h 158 296 mA h 3 814 V 1 129 W h 159 303 8 mA h 3 85 V 1 17 W h 151 308 8 mA h 3 85 V 1 189 W h 152 LTE 352 mA h 3 82 V 1 34 W h 160 Charge Times 1 5 hours to 80 2 hours to 100 161 1 5 hours to 80 2 hours to 100 162 1 5 hours to 80 2 5 hours to 100 161 1 5 hours to 80 2 5 hours to 100 1 hour to 80 1 5 hours to 100 163 45 minutes to 80 75 minutes to 100 164 1 5 hours to 80 2 5 hours to 100 45 minutes to 80 75 minutes to 100 1 hour to 80 1 5 hours to 100 Greenhouse Gas Emissions 50 kg CO2e 165 20 kg CO2e 166 30 kg CO2e 167 Non LTE 28 kg CO2e 168 LTE 36 kg CO2e 169 Non LTE 38 kg CO2e 170 LTE 39 kg CO2e 171 All 40 kg CO2e 172 All 35 kg CO2e 173 All 36 kg CO2e 174 All 34 kg CO2e 175 All 31 kg CO2e 176 All 33 kg CO2e 177 56 kg CO2e 178 Dates Introduced September 9 2014 September 7 2016 September 12 2017 September 12 2018 September 10 2019 September 15 2020 September 14 2021 September 7 2022Released April 24 2015 September 12 2016 September 16 2016 September 22 2017 September 21 2018 September 25 2019 September 18 2020 October 15 2021 September 16 2022 September 23 2022Discontinued September 7 2016 September 12 2018 September 12 2017 September 7 2022 September 10 2019 September 15 2020 September 7 2022 October 8 2021 179 September 7 2022 In productionUnsupported September 17 2018 December 14 2020 September 12 2022 CurrentModel Numbers 180 A1553 38 mm A1554 42 mm A1802 38 mm A1803 42 mm A1757 38 mm A1758 42 mm Edition A1816 38 mm A1817 42 mm GPS A1858 38 mm A1859 42 mm GPS Cellular Americas A1860 38 mm A1861 42 mm Europe and Asia Pacific A1889 38 mm A1891 42 mm China mainland A1890 38 mm A1892 42 mm GPS A1977 40 mm A1978 44 mm GPS Cellular North America A1975 40 mm A1976 44 mm Europe Asia Pacific and China mainland A2007 40 mm A2008 44 mm GPS A2092 40 mm A2093 44 mm GPS Cellular North America A2094 40 mm A2095 44 mm Europe Asia Pacific and China mainland A2156 40 mm A2157 44 mm GPS A2351 40 mm A2352 44 mm GPS Cellular North America A2353 40 mm A2354 44 mm Europe Asia Pacific and China mainland A2355 40 mm A2356 44 mm GPS A2291 40 mm A2292 44 mm GPS Cellular North America A2293 40 mm A2294 44 mm Europe Asia Pacific and China mainland A2375 40 mm A2376 44 mm GPS A2473 41 mm A2474 45 mm GPS Cellular North America A2475 41 mm A2477 45 mm Europe Asia Pacific and China mainland A2476 41 mm A2478 45 mm GPS A2722 40 mm A2723 44 mm GPS Cellular North America A2726 40 mm A2727 44 mm Europe and Asia Pacific A2725 40 mm A2724 44 mm China mainland A2855 40 mm A2856 44 mm GPS A2770 41 mm A2771 45 mm GPS Cellular North America A2772 41 mm A2774 45 mm Europe and Asia Pacific A2773 41 mm A2775 45 mm China mainland A2857 41 mm A2858 45 mm North America A2622Europe and Asia Pacific A2684China mainland A2859FCC ID BCG E2870 181 BCG E2871 182 BCG E3102 183 BCG E3103 184 BCG E3104 185 BCG E3105 186 BCG A1858 187 BCG A1859 188 BCG A1860 189 BCG A1861 190 BCG A1889 191 BCG A1891 192 BCG A1890 193 BCG A1892 194 BCG A1977 195 BCG A1978 196 BCG A1975 197 BCG A1976 198 BCG A2007 199 BCG A2008 200 BCG A2092 201 BCG A2093 202 BCG A2094 203 BCG A2095 204 BCG A2156 205 BCG A2157 206 BCG A2351 207 BCG A2352 208 BCG A2353 209 BCG A2354 210 BCG A2355 211 BCG A2356 212 BCG A2291 213 BCG A2292 214 BCG A2293 215 BCG A2294 216 BCG A2375 217 BCG A2376 218 Starting price US small large Base model Aluminum 349 399 219 269 220 369 220 GPS 329 359GPS Cellular 399 221 GPS 399 429GPS Cellular 499 529 222 223 224 GPS 279 309GPS Cellular 329 359 225 GPS 399 429GPS Cellular 499 529 GPS 249 279GPS Cellular 279 329 GPS 399 429GPS Cellular 499 529 Stainless steel 549 599 219 549 749 799 226 699 749 222 224 699 749 699 749Nike 369 220 GPS 329 221 399 223 224 279 399 Hermes 1 149 220 1 149 221 1 249 223 224 1 229 1 229Edition 10 000 12 000 227 1 249 1 299 228 1 299 1 349 226 222 799 Ti 224 1 299 Ceramic 229 799 Titanium 799Physical specifications Series Small LargeAl iii SS iv Ed v Img Al SS Ed Img1st gen 124 16 125 H 38 6 mm 1 52 in 42 0 mm 1 65 in W 33 3 mm 1 31 in 35 9 mm 1 41 in D 10 5 mm 0 41 in 10 5 mm 0 41 in Weight 25 g 0 88 oz 40 g 1 4 oz 54 55 g 1 9 1 9 oz 30 g 1 1 oz 50 g 1 8 oz 67 69 g 2 4 2 4 oz 1 126 H 38 6 mm 1 52 in 42 5 mm 1 67 in W 33 3 mm 1 31 in 36 4 mm 1 43 in D 10 5 mm 0 41 in 10 5 mm 0 41 in Weight 25 g 0 88 oz 30 g 1 1 oz 2 17 H 38 6 mm 1 52 in 39 2 mm 1 54 in 42 5 mm 1 67 in 42 6 mm 1 68 in W 33 3 mm 1 31 in 34 0 mm 1 34 in 36 4 mm 1 43 in 36 5 mm 1 44 in D 11 4 mm 0 45 in 11 8 mm 0 46 in 11 4 mm 0 45 in 11 8 mm 0 46 in Weight 28 2 g 0 99 oz 41 9 g 1 48 oz 39 6 g 1 40 oz 34 2 g 1 21 oz 52 4 g 1 85 oz 45 6 g 1 61 oz 3 10 H 38 6 mm 1 52 in 39 2 mm 1 54 in 42 5 mm 1 67 in 42 6 mm 1 68 in W 33 3 mm 1 31 in 34 0 mm 1 34 in 36 4 mm 1 43 in 36 5 mm 1 44 in D 11 4 mm 0 45 in 11 8 mm 0 46 in 11 4 mm 0 45 in 11 8 mm 0 46 in Weight 26 7 28 7 g 0 94 1 01 oz 42 4 g 1 50 oz 40 1 g 1 41 oz 32 3 34 9 g 1 14 1 23 oz 52 8 g 1 86 oz 46 4 g 1 64 oz 4 11 H 40 mm 1 6 in 44 mm 1 7 in W 34 mm 1 3 in 38 mm 1 5 in D 10 7 mm 0 42 in 10 7 mm 0 42 in Weight 30 1 g 1 06 oz 39 8 g 1 40 oz 36 7 g 1 29 oz 47 9 g 1 69 oz 5 128 H 40 mm 1 6 in 44 mm 1 7 in W 34 mm 1 3 in 38 mm 1 5 in D 10 74 mm 0 423 in 10 74 mm 0 423 in Weight 30 8 g 1 09 oz 40 6 g 1 43 oz 35 1 39 7 g 1 24 1 40 oz Ti C 36 5 g 1 29 oz 47 8 g 1 69 oz 41 7 46 7 g 1 47 1 65 oz Ti CSE 1st gen 13 H 40 mm 1 6 in 44 mm 1 7 in W 34 mm 1 3 in 38 mm 1 5 in D 10 7 mm 0 42 in 10 7 mm 0 42 in Weight 30 49 30 68 g 1 076 1 082 oz 36 20 36 36 g 1 277 1 283 oz 6 14 H 40 mm 1 6 in 44 mm 1 7 in W 34 mm 1 3 in 38 mm 1 5 in D 10 7 mm 0 42 in 10 7 mm 0 42 in Weight 30 5 g 1 08 oz 39 7 g 1 40 oz 34 6 g 1 22 oz 36 5 g 1 29 oz 47 1 g 1 66 oz 41 3 g 1 46 oz 7 130 H 41 mm 1 6 in 45 mm 1 8 in W 35 mm 1 4 in 38 mm 1 5 in D 10 74 mm 0 423 in 10 74 mm 0 423 in Weight 32 0 g 1 13 oz 42 3 g 1 49 oz 37 0 g 1 31 oz 38 8 g 1 37 oz 51 5 g 1 82 oz 45 1 g 1 59 oz SE 2nd gen H 40 mm 1 6 in 44 mm 1 7 in W 34 mm 1 3 in 38 mm 1 5 in D 10 7 mm 0 42 in 10 7 mm 0 42 in Weight 26 4 27 8 g 0 93 0 98 oz 32 9 33 0 g 1 16 1 16 oz 8 H 41 mm 1 6 in 45 mm 1 8 in W 35 mm 1 4 in 38 mm 1 5 in D 10 74 mm 0 423 in 10 74 mm 0 423 in Weight 32 0 g 1 13 oz 42 3 g 1 49 oz 38 8 g 1 37 oz 51 5 g 1 82 oz Ultra H 49 mm 1 9 in W 44 mm 1 7 in D 14 4 mm 0 57 in Weight 61 3 g 2 16 oz a b c d e f g h i Viewable area reduced by rounded corners At time of original release Watch with aluminum body Watch with stainless steel body Edition collection with 18K gold 1st gen ceramic Series 2 3 5 or titanium Series 5 6 7 body Collections and materials Edit Collections and materials 180 Series Watch Nike Hermes Edition1st Gen Body Sport Aluminum Silver Space Gray Rose Gold Gold 124 Stainless steel Polished or Space Black 16 N A Stainless steel Polished 18K Gold Rose or Yellow 125 Crystal Sport Ion X 124 Sapphire 16 Sapphire Sapphire 125 Back Sport Composite 124 Ceramic 16 Ceramic with Hermes logo Ceramic 125 1 Body Aluminum Space Gray Gold Rose Gold Silver N ACrystal Ion XBack Composite2 Body Aluminum Space Gray Gold Rose Gold Silver Stainless steel Space Black Polished Aluminum Space Gray Silver Stainless steel Polished Ceramic White Crystal Ion X Sapphire Ion X SapphireBack Ceramic Ceramic Ceramic with Hermes logo Ceramic3 Body Aluminum Space Gray Gold Silver Stainless steel Space Black Polished Aluminum Space Gray Silver Stainless steel Polished Ceramic White Gray Crystal Ion X Sapphire Ion X SapphireBack Composite GPS Ceramic Composite GPS with Nike logo Ceramic with Hermes logo CeramicCeramic GPS LTE Ceramic GPS LTE with Nike Logo4 Body Aluminum Space Gray Gold Silver Stainless steel Polished Space Black Gold Aluminum Space Gray Silver Stainless steel Polished N ACrystal Ion X Sapphire Ion X SapphireBack Ceramic Ceramic with Nike logo Ceramic with Hermes logo5 Body Aluminum Space Gray Gold Silver Stainless steel Polished Space Black Gold Aluminum Space Gray Silver Stainless steel Polished Space Black Titanium Dark Light Ceramic White Crystal Ion X Sapphire Ion X SapphireBack Ceramic Ceramic with Nike logo Ceramic with Hermes logo CeramicSE 1st gen Body Aluminum Space Gray Gold Silver Aluminum Space Gray Silver N ACrystal Ion X Ion XBack Ceramic Ceramic with Nike logo6 Body Aluminum Space Gray Gold Silver Red Blue Stainless steel Silver Graphite Gold Aluminum Space Gray Silver Stainless steel Silver Space Black Titanium Natural Space Black Crystal Ion X Sapphire Ion X SapphireBack Ceramic Ceramic with Nike logo Ceramic with Hermes logo Ceramic7 Body Aluminum Midnight Starlight Green Blue PRODUCT RED Stainless steel Silver Graphite Gold Aluminum Midnight Starlight Stainless steel Silver Space Black Titanium Natural Space Black Crystal Ion X Sapphire Ion X SapphireBack Ceramic Ceramic with Nike logo Ceramic with Hermes logo CeramicSE 2nd gen Body Aluminum Midnight Starlight Silver N ACrystal Ion XBack Composite8 Body Aluminum Midnight Starlight Silver PRODUCT RED Stainless steel Silver Graphite Gold N A Stainless steel Silver Space Black N ACrystal Ion X Sapphire SapphireBack Ceramic Ceramic with Hermes logoUltra Body Titanium N ACrystal SapphireBack Ceramic and sapphire1st generation only Apple Watch was sold as Apple Watch Sport Aluminum body and Apple Watch Stainless steel body Later generations sold both body materials as Apple Watch Reception Edit An Apple Store opens its doors on the first day of sales of the Apple Watch Following the announcement initial impressions from technology and watch industry observers were varied the watch was praised by some for its design potential capabilities and eventual usefulness 230 while others offered criticism of these same aspects 230 Venture capitalist Marc Andreessen said he can t wait to try it 231 and Steve Jobs biographer Walter Isaacson described it as extremely cool and an example of future technology that is much more embedded into our lives 232 Evan Dashevsky of PC Magazine said it offered nothing new in terms of functionality compared to the Moto 360 except the customizable vibration notifications 233 In November 2014 Apple Watch was listed by Time as one of the 25 Best Inventions of 2014 234 Initial reviews for the device have been generally positive with some caveats 235 Reviewers praised the watch s potential ability to integrate into everyday life and the overall design of the product but noted issues of speed and price Many reviewers described the watch as functional and convenient while also noting failure to offer as much potential functionality as preceding smartphones Farhad Manjoo of The New York Times mentioned the device s steep learning curve stating it took him three long often confusing and frustrating days to become accustomed to watchOS 1 but loved it thereafter 236 Some reviewers also compared it to competing products such as Android Wear devices and claimed The Smartwatch Finally Makes Sense 237 Reviewers had mixed opinions on battery life though with Geoffrey Fowler of The Wall Street Journal saying the battery lives up to its all day billing but sometimes just barely 237 and others compared it to the Samsung Gear 2 which strolls through three days of moderate usage 238 Tim Bradshaw of the Financial Times used several applications over a period of days He concluded that there is no killer application so far besides telling the time which is the basic function of a wristwatch anyhow 239 When using the Apple Watch some users have reported issues using the heart monitoring feature due to permanent skin conditions including tattoos The Watch uses photoplethysmography technology PPG that utilizes the green LED lights to measure heart rates 240 241 To gauge a user s heart rate the watch flashes green light from the LEDs at the skin and records the amount of this light that is absorbed by the red pigment of the blood 242 Under certain circumstances the skin may not allow for the light absorption to be read properly and thus provide inaccurate results 243 Some users have complained that the logo and text on the back of the Apple Watch Sport model primarily the space gray version 244 can be easily worn off 245 Sales Edit Apple Watch Series 5 Financial analysts offered early sales estimates from a few million to as many as 5 million in the first year 246 Time s Tim Bajarin summarized the breadth of reactions writing that there is not enough information yet to determine how this product will fare when it finally reaches the market next year 230 Owing to the inadequacy of materials the Apple Watch s delivery was delayed from its initial pre order release date of April 10 2015 247 As a result only 22 percent of the pre ordered Apple Watches were dispatched in the United States during the weekend after the release date 248 It is estimated Apple received almost one million Apple Watch pre orders in the United States during the initial six hours of the pre order period on April 10 2015 after which it sold out and further orders would start delivering in June 249 A report later on by an analyst stated that Apple Watch was already a 10 billion business during its first year 250 Apple has not disclosed any sales figures for the Apple Watch 251 An estimate by IDC states Apple shipped over 12 million units in 2015 252 In late 2016 a veteran of the Swiss watch industry said Apple sold about 20 million watches and had a market share of about 50 percent 253 Analysts estimate Apple sold 18 million watches in 2017 31 million in 2019 and 34 million in 2020 254 In 2021 analysts estimated there were 100 million units in use 255 In 2020 Apple sold more watches than the entire Swiss watch industry which includes Swatch and TAG Heuer among others 256 Controversies EditIn December 2019 Joseph Wiesel a New York University cardiologist sued Apple over allegations that the Apple Watch violates a patented method for detecting atrial fibrillation Wiesel stated he had shared details of the patent with Apple in September 2017 the company refused to negotiate 257 Following Apple s announcement of the Series 7 an independent software development company filed a lawsuit against Apple alleging inappropriate copying of the software keyboard functionality from an app that Apple had previously rejected from its App Store 258 See also EditList of iOS and iPadOS devicesNotes Edit In September 2016 the second generation of Apple Watch was divided into two Series the Series 2 and the budget Series 1 with different internal components 23 In September 2020 the sixth generation of Apple Watch was divided into the Series 6 and the budget SE also carrying different internal components 24 In September 2022 the eighth generation of Apple Watch was divided into the Series 8 the updated second generation of the budget SE and the Ultra again each with different internal components and also with different external appearances 25 For convenience sake this article treats each SE generation and the Ultra as the equivalent of a numbered Series Except for the initial configuration a Family Setup option removes the need for an iPhone altogether although fewer features are supported 30 31 References Edit Eva Dou June 20 2014 Who Is Apple s Watch Maker The Wall Street 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