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This article is about smartwatches generally. For the Sony brand, see Sony SmartWatch.

A smartwatch is a touchscreen wearable computer in the form of a wristwatch. While early models could perform basic tasks, such as calculations, digital time telling, translations, and game-playing, 2010s smartwatches have more general functionality closer to smartphones, including mobile apps, a mobile operating system and Bluetooth connectivity. Some smartwatches function as portable media players, with FM radio and playback of digital audio and video files via a Bluetooth or USB headset. Some models, called 'watch phones' (or vice versa), have complete functionality of a typical smartphone using LTE technology.[1][2][3]

While internal hardware varies, most have an electronic visual display, either backlit LCD or OLED or Hologram.[4] Some use transflective or electronic paper, to consume less power. Most have a rechargeable battery. Peripheral devices may include digital cameras, thermometers, accelerometers, pedometers, heart rate monitors, altimeters, barometers, compasses, GPS receivers, tiny speakers, and SD cards, which are recognized as storage devices by many other kinds of computers.

Software may include digital maps, schedulers and personal organizers, calculators, and various kinds of watch faces. The watch may communicate with external devices such as sensors, wireless headsets, or a heads-up display. Like other computers, a smartwatch may collect information from internal or external sensors and it may control, or retrieve data from, other instruments or computers. It may support wireless technologies like Bluetooth, Wi-Fi, and GPS. For many purposes, a "watch computer" serves as a front end for a remote system such as a smartphone, communicating with the smartphone using various wireless technologies. Smartwatches are advancing, especially their design, battery capacity, and health-related applications.[5]

Features and applications

Many smartwatch models manufactured in the 2010s are completely functional as standalone products.[6] Some serve as being used in sports, the GPS tracking unit being used to record historical data. For example, after a workout, data can be uploaded onto a computer or online to create a log of activities for analysis or sharing. Some watches can serve as full GPS watches, displaying maps and current coordinates, and recording tracks. Users can "mark" their current location and then edit the entry's name and coordinates, which enables navigation to those new coordinates. As companies add competitive products into the market, media space is becoming a desired commodity on smartwatches. With Apple, Sony, Samsung, and Motorola introducing their smartwatch models, 15% of tech consumers[7] use wearable technologies. This is a dense market[clarification needed] of tech consumers who possess buying power, which has attracted many advertisers. It is expected for mobile advertising on wearable devices to increase heavily by 2017 as advanced hypertargeting modules are introduced to the devices. In order for an advertisement to be effective on a smartwatch, companies have stated that the ad must be able to create experiences native to the smartwatch itself.[8]

"Sport watch" functionality often includes activity tracker features (also known as "fitness tracker") as seen in GPS watches made for training, diving, and outdoor sports. Functions may include training programs (such as intervals), lap times, speed display, GPS tracking unit, Route tracking, dive computer, heart rate monitor compatibility, Cadence sensor compatibility, and compatibility with sport transitions (as in triathlons). Other watches can cooperate with an app in a smartphone to carry out their functions. They are paired usually by Bluetooth with a smartphone. Some of these only work with a phone that runs the same mobile operating system; others use a unique watch OS, or otherwise are able to work with most smartphones. Paired, the watch may function as a remote to the phone. This allows the watch to display data such as calls, SMS messages, emails, calendar invites, and any data that may be made available by relevant phone apps. Some fitness tracker watches give users reports on the number of kilometers they walked, hours they slept, and so on.

LTE

Main article: LTE (telecommunication)

Starting around 2014, several manufacturers started to release smartwatches with LTE (watch smartphones), allowing for direct 3G/4G connection to the general telephone networks just like any other smartphone.

History

Early years

The first digital watch, which debuted in 1972, was the Pulsar manufactured by Hamilton Watch Company. "Pulsar" became a brand name which would later be acquired by Seiko in 1978. In 1982, a Pulsar watch (NL C01) was released which could store 24 digits, making it most likely the first watch with user-programmable memory, or "memorybank" watch.[9] With the introduction of personal computers in the 1980s, Seiko began to develop computers in the form of watches. The Data 2000 watch (1983) came with an external keyboard for data-entry. Data was synced from the keyboard to the watch via electro-magnetic coupling (wireless docking). The name comes from its ability to store 2000 characters. The D409 was the first Seiko model with on-board data entry (via a miniature keyboard) and featured a dot matrix display.[10] Its memory was tiny, at only 112 digits.[9] It was released in 1984, in gold, silver and black.[11] These models were followed by many others by Seiko during the 1980s, most notably the "RC Series": During the 1980s, Casio began to market a successful line of "computer watches", in addition to its calculator watches. Most notable was the Casio data bank series. Novelty "game watches", such as the Nelsonic game watches, were also produced by Casio and other companies.[citation needed]

Seiko RC series

The RC-1000 Wrist Terminal was the first Seiko model to interface with a computer, and was released in 1984.[10] It was developed by Seiko Epson and was powered by a computer on a chip.[12] It was compatible with most of the popular PCs of that time, including Apple II, II+ and IIe, the Commodore 64, IBM PC, NEC 8201, Tandy Color Computer, Model 1000, 1200, 2000 and TRS-80 Model I, III, 4 and 4p. The RC-20 Wrist Computer was released in 1985, under the joint brand name "Seiko Epson".[13][14] It had a SMC84C00 8-bit Z-80 microprocessor; 8 KB of ROM and 2 KB of RAM. It had applications for scheduling, memos, and world time and a four-function calculator app. The dot-matrix LCD displayed 42×32 pixels, and more importantly, was touch-sensitive. Like the RC-1000, it could be connected to a personal computer, in this case through a proprietary cable. It was also notable in that it could be programmed, although its small display and limited storage severely limited application development.[10] The RC-4000 PC Data graph also released in 1985, was dubbed the "world's smallest computer terminal".[10] It had 2 KB of storage. The RC-4500 (1985), also known as the Wrist Mac, had the same features as the RC-4000, but came in a variety of bright, flashy colors.

Timex Datalink Model 150 as worn by commander William Shepherd during Expedition 1 and cosmonaut Mikhail Tyurin, Expedition 14, on the ISS in 2006

1994

The Timex Datalink wristwatch, was introduced in 1994. The early Timex Datalink Smartwatches realized a wireless data transfer mode to communicate with a PC. Appointments and contacts created with Microsoft Schedule+, the predecessor of MS Outlook, could be easily transmitted to the watch via a screen blinking light protocol.

1998

In 1998, Steve Mann invented, designed, and built the world's first Linux wristwatch,[15] which he presented at IEEE ISSCC2000 on 7 February 2000, where he was named "the father of wearable computing".[16] See also Linux Journal,[17] where Mann's Linux wristwatch appeared on the cover and was the feature article of LJ Issue 75. Seiko launched the Ruputer in Japan - a wristwatch computer with a 3.6 MHz processor. It was not very successful, since instead of a touchscreen it used a joystick-like device to input characters (much like high scores in arcade games), and the small screen with a resolution at 102x64 in 4 greyscales made it hard to read large amounts of text. Outside of Japan, this watch was distributed as the Matsucom onHand PC. Despite the rather low demand, the Matsucom onHand PC was distributed until 2006, making it a smartwatch with a rather long life cycle. Ruputer and onHand PC applications are 100% compatible. This watch is sometimes considered the first smartwatch since it was the first watch to offer graphics display (albeit monochrome) and many 3rd party applications (mostly homebrew).

1999

In 1999, Samsung launched the world's first watch phone, the SPH-WP10. It had a protruding antenna, a monochrome LCD screen, and a 90-minutes of talk time with an integrated speaker and microphone.[18]

2000

The first Linux Smartwatch[15] was presented at IEEE ISSCC2000 on 7 February 2000, where presenter Steve Mann was named "the father of wearable computing".[16] This watch also appeared on the cover and was the feature article of LJ Issue 75.[19]

In June 2000, IBM displayed a prototype for a wristwatch that ran Linux. The original version had only 6 hours of battery life, which was later extended to 12.[20] It featured 8 MB of memory and ran Linux 2.2.[21] The device was later upgraded with an accelerometer, vibrating mechanism, and fingerprint sensor. IBM began to collaborate with Citizen Watch Co. to create the "WatchPad". The WatchPad 1.5 features a 320 × 240 QVGA monochrome touch sensitive display and runs Linux 2.4.[22][23] It also features calendar software, Bluetooth, 8 MB of RAM and 16 MB of flash memory.[24][25] Citizen was hoping to market the watch to students and businessmen, with a retail price of around $399.[25] Epson Seiko introduced their Chrono-bit wristwatch in September 2000. The Chrono-bit watches feature a rotating bezel for data input, synchronize PIM data via a serial cable, and can load custom watch faces.[26]

2003

In 2003, Fossil released the Wrist PDA, a watch which ran the Palm OS and contained 8 MB of RAM and 4 MB of flash memory.[27][28] It contained a built in stylus to help use the tiny monochrome display, which had a resolution of 160×160 pixels. Although many reviewers declared the watch revolutionary, it was criticized for its weight (108 grams) and was ultimately discontinued in 2005.[29]

2004

Microsoft releases the SPOT smartwatch. SPOT stands for Smart Personal Objects Technology, an initiative by Microsoft to personalize household electronics and other everyday gadgets. The watch was supposed to offer information at a glance where other devices would have required more immersion and interaction. The SPOT Watch had a monochrome 90×126 pixel screen.[30]

2006

Sony Ericsson teamed up with Fossils, and released the first watch, MBW-100, that connected to Bluetooth. This watch notified the user when receiving calls and text messages. Though the watch was not popular as it would only connect and work with Sony Ericsson cell phones.[31]

2009

In 2009, Hermen van den Burg, CEO of Smartwatch and Burg Wearables, launches Burg the first standalone smartphone watch which has its own sim card and does not require to be tethered to a smartphone. Burg receives the award for the Most Innovative Product at the Canton Fair in April 2009[32][33][34][35][36][37][38] Also, Samsung launched the S9110 Watch Phone which featured a 1.76-inch (45 mm) color LCD display and was 11.98 millimetres (0.472 in) thin.[18]

2010

Sony Ericsson launches the Sony Ericsson LiveView, a wearable watch device which is basically an external Bluetooth display for an Android Smartphone.

Vyzin Electronics private Limited unveiled their first medical alert smart watch for health with cellular, GPS and medicine reminder and SOS for help during emergency.[39]

2011

Vyzin Electronics Private Limited launched a ZigBee enabled smart watch[40] with cellular connectivity for remote health monitoring called VESAG.[41]

Motorola released MOTOACTV on November 6, 2011.

2012

Pebble (watch) was an innovative smartwatch that raised the most money at the time on Kickstarter reaching $10.3 Million between April 12 and May 18, 2012. The watch has a 32-millimetre (1.26 in) 144 × 168 pixel black and white memory LCD using an ultra low-power "transflective LCD" manufactured by Sharp with a backlight, a vibrating motor, a magnetometer, ambient light sensors, and a three-axis accelerometer.[42][43][44][45][46] It can communicate with an Android or iOS device using both Bluetooth 2.1 and Bluetooth 4.0 (Bluetooth Low Energy) using Stonestreet One's Bluetopia+MFi software stack.[47] Bluetooth 4.0 with low energy (LE) support was not initially enabled, but a firmware update in November 2013 enabled it.[48] The watch is charged using a modified USB-cable that attaches magnetically to the watch to maintain water resistance capability.[44] The battery was reported in April 2012 to last seven days.[49] Based on feedback from Kickstarter backers, the developers added water-resistance to the list of features.[50] The Pebble has a waterproof rating of 5 atm, which means it can be submerged down to 40 metres (130 ft) and has been tested in both fresh and salt water, allowing one to shower, dive or swim while wearing the watch.[51]

2013

In 2013, the claim to first ever smartwatch to capture the full capability of a smartphone was laid by startup Omate with the TrueSmart. The TrueSmart originated from a Kickstarter campaign which raised over 1 million dollars, making it the 5th most successful Kickstarter to date. The TrueSmart made its public debut in early 2014.[52] Consumer device analyst Avi Greengart, from research firm Current Analysis, suggested that 2013 may be the "year of the smartwatch", as "the components have gotten small enough and cheap enough" and many consumers own smartphones that are compatible with a wearable device. Wearable technology, such as Google Glass, may evolve into a business worth US$6 billion annually and a July 2013 media report, revealed that the majority of major consumer electronics manufacturers were undertaking work on a smartwatch device at the time of publication. The retail price of a smartwatch could be over US$300, plus data charges, while the minimum cost of smartphone-linked devices may be US$100.[53][54]

As of July 2013, the list of companies that were engaged in smartwatch development activities consists of Acer, Apple, BlackBerry, Foxconn/Hon Hai, Google, LG, Microsoft, Qualcomm, Samsung, Sony, VESAG and Toshiba. Some notable omissions from this list include HP, HTC, Lenovo, and Nokia.[54] Science and technology journalist Christopher Mims identified the following points in relation to the future of smartwatches:

  • The physical size of smartwatches is likely to be large.
  • Insufficient battery life is an ongoing problem for smartwatch developers, as the battery life of devices at the time of publication was three to four days and this is likely to be reduced if further functions are added.
  • New display technologies will be invented as a result of smartwatch research.
  • The success level of smartwatches is unpredictable, as they may follow a similar trajectory to netbooks, or they may fulfill aims akin to those of Google Glass, another wearable electronic product.[55]

Acer's S.T. Liew stated in an interview with British gadget website Pocket-Lint, "... I think every consumer company should be looking at wearable. Wearable isn’t new … it just hasn’t exploded in the way that it should. But the opportunity’s for billions of dollars’ worth of industry."[56]

HOT Watch by PHTL features a speaker and microphone on the strap allowing for calls to be answered on the watch.
HOT Watch speaker and microphone embedded on the strap. Magnetic charging pins at left.

As of 4 September 2013, three new smartwatches have been launched: the Samsung Galaxy Gear, Sony SmartWatch 2,[57] and the Qualcomm Toq.[58] PHTL, a company based in Dallas, Texas, completed is crowd-funding process on Kickstarter for its HOT Watch smartwatch in September 2013. This device enables users to leave their handsets in their pockets, since it has a speaker for phone calls in both quiet and noisy environments.[59] In a September 2013 interview, Pebble founder Eric Migicovsky stated that his company was not interested in any acquisition offers,[60] but revealed in a November 2013 interview, that his company has sold 190,000 smartwatches, the majority of which were sold after its Kickstarter campaign closed.[55]

Motorola Mobility CEO Dennis Woodside confirmed that his company is working on a smartwatch during a December 2013 interview.[61] Woodside showed an awareness of the difficulties that other companies have experienced with wrist-wearable technologies and explained:

2014

At the 2014 Consumer Electronics Show, a large number of new smartwatches were released from various companies such as Razer Inc,[62] Archos,[63] and several other companies, as well as a few startups. Some had begun to call the 2014 CES, a "wrist revolution"[64] because of the number of smartwatches released and the huge amount of publicity they began to receive at the start of 2014. At Google I/O on 25 June 2014, the Android Wear platform was introduced and the LG G Watch and Samsung Gear Live were released. The Wear-based Moto 360 was announced by Motorola in 2014.[65] At the end of July, Swatch's CEO Nick Hayek announced that they will launch a Swatch Touch with smartwatch technologies in 2015.[66] In the UK, the Wearable Technology Show had its début in London and was host to several smartwatch companies exhibiting their newest models.

The launch of Samsung's Gear S smartwatch was covered by the media in late August 2014. The model features a curved Super AMOLED display and a built-in 3G modem, with technology writer Darrell Etherington stating on the TechCrunch website, "we’re finally starting to see displays that wrap around the contours of the wrist, rather than sticking out as a traditional flat surface." The corporation commenced selling the Gear S smartwatch in October 2014, alongside the Gear Circle headset accessory.[67] At IFA 2014 Sony Mobile announced the third generation of its smartwatch series, the Sony Smartwatch 3 powered by Android Wear.[68] Also, the Fashion Entertainments' e-paper watch was announced.[69]

Apple Watch
Apple Watch

On 9 September 2014, Apple Inc. announced its first smartwatch called Apple Watch to be released in early 2015.[70] On 24 April 2015, Apple Watch began shipping across the world.[71] Apple’s first try into wearable technology was met with considerable criticism during the pre-launch period, with many early technology reviews citing issues with battery life and hardware malfunctions. However, others praised Apple for creating a potentially fashionable device that can compete with "traditional watches,"[72] not just the smartwatch industry in general. The watch only turns on when activated (either by lifting one's wrist, touching the screen, or pressing a button). On 29 October 2014, Microsoft announced the Microsoft Band, a smart fitness tracker and the company's first venture into wrist-worn devices since SPOT (Smart Personal Objects Technology) a decade earlier. The Microsoft Band was released at $199 the following day, on 30 October 2014.[73]

2015

In October 2015, Samsung unveiled the Samsung Gear S2. It features a rotating bezel for ease of use, and an IP68 rating for water resistance up to 1.5 meters deep in 30 minutes. The watch is compatible with industry-standard 20 mm straps.

2016

At the 2016 Consumer Electronics Show, Razer released the Nabu Watch, a dual-screen smartwatch: integrates an always-on illuminated backlit display, that takes care of some pretty standard features as date and time, and a second OLED screen, which is activated by raising your wrist, allows access to extra smart features.[74] Luxury watchmaker TAG Heuer released TAG Heuer Connected, a smartwatch powered by Android Wear.[75]

On 31 August 2016, Samsung unveiled the Samsung Gear S3 smartwatch, with a higher specifications, there are at least two models, the Samsung Gear S3 Classic and the LTE version Samsung Gear S3 Frontier.[76]

2017

The top smartwatches that debuted at the 2017 Consumer Electronics Show included the Casio WSD-F20, Misfit Wearables Vapor and the Garmin Fenix 5 series.[77] Apple released on September 22, 2017 their Apple Watch Series 3 model which offers built in LTE cellular connectivity allowing phone calls, messaging and data without relying on a nearby smartphone connection. [78]

2018

Samsung introduced the LTE Galaxy Watch.[79]

Children's smartwatches in China

In China, since around 2015, smartwatches have become widely used by schoolchildren. They are advertised on television throughout the country as a safety device whereby the child can call in case of emergency. The devices are commonly colorful and made of plastic. They normally have no display unless a button is pushed. These smartwatches have limited capability compared to other smartwatches; their main functions consist of being able to conduct calls, displaying of time, and sometimes have air temperature sensitivity. They cost around $100 to $200 USD.

Operating systems

Main article: Mobile operating system

Wear OS

Main article: Wear OS

Wear OS is a smartwatch operating system developed by Google Inc.

Android OS

Main article: Android OS

Android OS is a operating system developed by Google Inc. The OS allows a watch to operate as a standalone smartphone. These are not compatible with "Wear", and should not be confused.

AsteroidOS

Main article: AsteroidOS

AsteroidOS is an open source firmware replacement for some Android Wear devices focused on user freedom, privacy, and community development.

Sailfish OS

Main article: Sailfish OS

Sailfish OS is a Linux-based operating system for various platforms, including Sailfish smartwatches.

watchOS

Main article: watchOS

watchOS is a proprietary mobile operating system developed by Apple Inc. to run on the Apple Watch.

Tizen

Tizen in a Samsung Gear2
Main article: Tizen

Tizen is a Linux-based operating system for devices, including smartphones/tablets, in-vehicle infotainment (IVI) devices, smart TVs, laptops/desktops and other platforms. Tizen is a project within the Linux Foundation and is governed by a Technical Steering Group (TSG) composed of Samsung and Intel among others. Samsung released the Samsung Gear 2, Gear 2 Neo, Samsung Gear S, Samsung Gear S2 and Samsung Gear S3 running Tizen.[80]

Ubuntu Touch

Main article: Ubuntu Touch

Ubuntu Touch is a mobile version of the Ubuntu operating system developed by Canonical UK Ltd and Ubuntu Community.[81] It is designed primarily for touchscreen mobile devices such as smartwatches and smartphones/tablets.

List of models in production

Smart watches Company
Alcatel OneTouch Alcatel
Asus ZenWatch Asus
Asus ZenWatch 2
Asus ZenWatch 3
Apple Watch Series 1 Apple
Apple Watch Series 2
Apple Watch Series 3
Casio WSD-F10 Casio, Mobvoi Ticwatch S&E, CoWatch, iMCO[82][83][84]
F80 Watch Abardeen
Fashion S9110 Un­known
Fitbit Blaze Fitbit
Fitbit Surge
Fossil Q Crewmaster Fossil
Fossil Q Explorist
Fossil Q Founder, Founder 2.0
Fossil Q Gazer
Fossil Q Marshal
Fossil Q Nate
Fossil Q Tailor
Fossil Q Wander
Garmin fenix 3 HR Garmin
Hyundai MB 910 Hyundai
iRist Intex Technologies[85]
LG G Watch, G Watch R LG
LG Watch Urbane, Watch Urbane Luxe, Watch Urbane 2nd Edition
LG Watch Sport, LG Watch Style
Neptune Pine Neptune Computer Inc.
Neptune Hub
Model One Olio
Moto 360 Motorola
MetaWatch Strata Meta Watch, Ltd
MetaWatch Frame
MetaWatch M1
Nike+ SportWatch Nike, Inc.
Nixion The Mission Nixon
Omate TrueSmart Omate
Polar M600 Polar
Qualcomm Toq[58] Qualcomm
Razer Nabu Watch Razer
Ruputer Seiko
Samsung Galaxy Gear[86] Samsung
Samsung Gear 2, Gear 2 Neo and Gear Fit[87]
Samsung Gear Live
Samsung Gear S2
Samsung Gear S3
Samsung Gear Fit 2 Pro
Smart Touch Tissot
Sony SmartWatch[86] Sony
SmartWatch 2[86]
Sony SmartWatch 3
TAG Heuer Connected TAG Heuer
Ticwatch 2 Mobvoi[88]
Timex Ironman ONE GPS+ Timex Group USA
Timex Datalink[89]
Vector Luna Vector Smart Watch
Vector Meridian
Vivoactive Garmin
Vivoactive HR
Wearing Digital Weda (Slap Band)[90] Wearing Digital
WIMM One Wimm Labs, acquired by Google[91]
Z1 Android Watch-Phone Un­known
Honor Z1 Huawei Honor
Q-18 Unknown
New Balance RunIQ New Balance
  • While more are in production with current development, some companies are using popular outlets such as Kickstarter or Indiegogo to fund their projects.[92]

Comparison

Hardware

See also: List of devices using Mediatek SoCs and IPS panel
Product Announced SIM card Processor RAM/Flash Resolution Display type Always-on display[93] Battery (mAh) BT Microphone
Razer Nabu Watch[94] January 2016 ☒N 128 x 16 single color OLED checkY (1 year) CR2032 and USB 4.0 LE
Samsung Galaxy Gear[95] 4 September 2013 ☒N Single-Core 800 MHz (Dual-Core 1.6 GHz) 512 MB/4 GB 320x320 OLED (Super AMOLED) Question? 315 4.0 LE
Samsung Gear 2[96] 22 February 2014 ☒N Dual-Core 1 GHz Exynos3250 512 MB/4 GB 320x320 OLED (Super AMOLED) Question? 300 4.0 LE
Samsung Gear 2 Neo[97] 22 February 2014 ☒N Dual-Core 1 GHz Exynos3250 512 MB/4 GB 320x320 Question? 300 4.0 LE
Samsung Gear Live[98] 25 June 2014 ☒N Single-Core 1.2 GHz MSM8226 512 MB/4 GB 320x320 OLED (SuperAMOLED) Question? 300 4.0 LE
Samsung Gear Fit[99] 11 April 2014 ☒N STM32F439[100] 160 MHz 16 MB 128x432 OLED (curved AMOLED) Question? 210 4.0
Samsung Gear S 28 August 2014 checkY nano-SIM Dual-Core 1 GHz 512 MB/4 GB 360x480 OLED (curved SuperAMOLED) checkY 300 4.1
LG G Watch 25 June 2014 ☒N Quad-Core 1.2 GHz MSM8226 512 MB/4 GB 280x280 LCD checkY 400 4.0 LE
LG G Watch R[101] 4 September 2014 ☒N Quad-Core 1.2 GHz MSM8226 512 MB/4 GB 320x320 OLED checkY 410 4.0 LE
LG Watch Urbane[102] 7 January 2015 ☒N Quad-Core 1.2 GHz MSM8226 512 MB/4 GB 320x320 OLED (P-OLED) checkY 410 4.1 LE
LG Watch Urbane LTE[103][104] 21 April 2015 checkY Quad-Core 1.2 GHz MSM8226 1 GB/4 GB 320x320 Question? 700 4.1 LE
Asus ZenWatch 3 September 2014 ☒N Quad-Core 1.2 GHz MSM8226 512 MB/4 GB 320x320 OLED (SuperAMOLED) checkY 410 4.0 LE
Sony SmartWatch 2 25 June 2013 ☒N Single-Core 180 MHz CM4 220x176 OLED Question? 225 3.0
Sony SmartWatch 3[101] 3 September 2014 ☒N Quad-Core 1.2 GHz BCM23550 512 MB/4 GB 320x320 Question? 420 4.0 LE
Motorola Moto 360[105] 18 March 2014 ☒N Single-Core 1 GHz TI OMAP 3 512 MB/4 GB 320x290 LCD checkY 320 4.0 LE
Apple Watch 9 September 2014 ☒N Apple S1 512 MB/8 GB 38 mm:
272×340
42 mm:
312×390		 OLED (AMOLED) ☒N 205 4.0 LE yes
Pebble Watch[106] 11 April 2012 ☒N Single-Core STM32F205RE 80 MHz CM3 128 KB/4 MB 144x168 LCD (e-paper) checkY 140 4.0 LE no
Pebble Time[106] May 2015 ☒N Single-Core STM32F439ZG 100 MHz CM4 256 KB/16 MB 144x168 LCD (e-paper) checkY 150 4.0 LE yes
Pebble 2 24 May 2016 ☒N LCD (e-paper) checkY yes
Qualcomm Toq 4 September 2013 ☒N 200 MHz CM3 288x192 IMOD-Mirasol Question? 240 3.0
Exetech XS3[107] 1 November 2013 checkY MTK 6577 512 MB/32 GB 240x240 Question? 420 4.0
U Watch U8[108] ☒N MTK2502C 128 MB 128×128 TFT LCD ☒N 230 3.0+EDR
U Watch U11[109] checkY MTK6260 360 MHz 320x320 HD ☒N 360 4.0+EDR

Software

Smart watch Company OS Android version iOS version CPU Type Bluetooth NFC Developer Options GPS Notify Link Loss Alert Notify Missed Call Notify Timer Notify View Content Call Conversation Find My Phone Voice Control Respond to Notifications Notify Sound Notify Backlit Screen Notify Vibration Ambient Light Sensor Gyroscope Magnetometer Multi-touch Accelerometer Dust and Water Resistance Clock Display Type Screen Size, Inches Screen Resolution, pixels Pixel density, ppi Display Technology Average Battery Life, days Battery Capacity, mAh Battery Technology Case Diameter, mm Case Thickness, mm Wrist Band Width, mm Weight (main unit+watchband), g Wristband Options Replaceable Wristbands LED Flashlight
HOT Smart Watch PHTL Proprietary 2.3-4.2 5-7 ARM Cortex M3 Processor 4.0 No Yes No Yes No No Yes Yes Yes Yes Yes Yes Yes Yes No Yes No Yes Yes Splash Proof Digital 1.26 Un­known Black and White ePaper 3 Un­known Lithium-ion 54 8 24.4 Un­known Un­known No Yes
Pebble Pebble Pebble OS 2.3-5.0 5-7 ARM Cortex-M3 4.0 No Yes No No Yes Yes Yes No No No No No Yes Yes Yes No Yes No Yes 50m (5 atm) Digital 1.26 144x168 Black and White ePaper 7 140 Lithium-ion 58.4 11 22 38 White, Black Yes No
Pebble Steel Pebble Pebble OS 2.3-5.0 5-7 ARM Cortex-M3 4.0 No Yes No No Yes Yes Yes No No No No No Yes Yes Yes No Yes No Yes IP67 / 50m (5 atm) Digital 1.26 144x168 Black and White ePaper Un­known 130 Lithium-ion Un­known Un­known Un­known Un­known Un­known Yes No
Pebble Time Pebble Pebble OS ARM Cortex M4 4.0+ No Yes No Yes Yes Yes Yes No No Yes Yes No Yes Yes Yes No 30m (3 atm) Digital / Analog 1.25 144x168 Color ePaper 7 150 Lithium-ion 38 9.5 22 45.5 Possible to change to smart-straps Yes No
Pebble Time Steel Pebble Pebble OS ARM Cortex M4 4.0+ No Yes No Yes Yes Yes Yes No No Yes Yes No Yes Yes Yes No 50m (5 atm) Digital / Analog 1.25 144x168 Color ePaper 10 Lithium-ion 47 10.5 22 62.3 Possible to change to smart-straps Yes No
Pebble Time Round Pebble Pebble OS ARM Cortex M4 4.0+ No Yes No Yes Yes Yes Yes No No Yes Yes No Yes Yes Yes No 1m (Splash Proof) IPX7 Digital / Analog 1 180x180 Color ePaper 2 56 Lithium-ion 38.5 7.5 14 28/32 Yes No
Pebble 2 Pebble Pebble OS ARM Cortex M4 4.1 No Yes No Yes Yes Yes Yes No No Yes Yes No Yes Yes Yes No 30m Digital / Analog 1.26 144x128 153 Black and White ePaper 7 39.5 9.8 22 31.7 Possible to change to smart-straps Yes No
Pebble Time 2 Pebble Pebble OS ARM Cortex M7 4.1 No Yes No Yes Yes Yes Yes No No Yes Yes No Yes Yes Yes No 30m Digital / Analog 1.5 200x228 202 Color ePaper 10 40.5 10.8 22 64.6 Possible to change to smart-straps Yes No
SmartWatch 2 Sony Micrium uC/OS-II 4.0+ No ARM Cortex-M4 (STM32F439) 3.0 Yes Yes No Un­known Un­known No Yes Un­known Un­known Un­known Un­known Un­known Yes Yes No Un­known No Yes Yes IP57 Digital 1.6 220x176 LCD 4 225 Lithium-ion 58.6 9 24 123 Un­known Yes No
SmartWatch 3 Sony Android Wear 4.3+ No ARM Cortex-A7 (BCM23550) 4.0 Yes Yes Yes Yes Yes Yes Yes Un­known Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes IP68 Digital 1.6 320x320 LCD (Transflective) 2 420 Lithium-ion 51 10 36 Un­known Silicon (Black/White/Lime), Stainless Steel Yes No
Watch Urbane LG Android Wear 4.3+ No 1.2 GHz Snapdragon 400 4.0 Yes Yes No Yes Yes Yes Yes Un­known Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes IP67 Digital 1.3 320x320 P-OLED 1 410 Lithium-ion 52.2 10.9 45.5 115 Un­known Yes No
Watch Urbane LTE LG WebOS No ARM Cortex-A7 (Qualcomm 400) 4.0 Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes IP67 Digital 1.3 320x320 P-OLED 1 410 Lithium-ion 52.2 10.9 45.5 115 Un­known Yes No
XS-3 Exetech Android 4.0+ No MTK 6577 4.0 No No Yes Un­known Yes Yes Yes Un­known Un­known Un­known Un­known Un­known Un­known Un­known No Un­known Un­known Un­known Un­known IP65 Digital 1.54 220x220 LCD 4 Un­known Un­known Un­known Un­known Un­known Un­known Un­known Un­known Un­known
Apple Watch (1st generation and Series 1) Apple watchOS No 8.2+ (1st generation) 10.0+ (Series 1) Apple S1 (1st generation) Apple S1P 4.0 LE ] From paired iPhone No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes IPX7 Digital 1.7 / 1.5 319x390 / 272x340 AMOLED 1.5 250 / 205 Lithium-ion 42 mm / 38 mm 12.46 / 12.3 36.2 / 32.9 Varies Yes Yes No
Apple Watch Series 3 Apple watchOS No 11.0+ Apple S3 with W2 4.2 Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes ISO standard 22810:2010 Digital 1.7 / 1.5 312x390 / 272x340 326 AMOLED .75 352 / 279 Lithium-ion 42 mm / 38 mm 11.4 36.2 / 32.9 Varies Yes Yes {{{1}}}
ZenWatch Asus Android Wear 4.3+ No 1.2 GHz Snapdragon 400 4.0 No Yes No Yes Yes Yes Yes Un­known Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes IP55 Digital 1.63 320x320 278 AMOLED 1 369 Lithium-ion 51 7.9 22 75 Un­known Yes No

See also

References

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