Smartwatch

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A smartwatch is a wearable computer in the form of a wristwatch; modern smartwatches provide a local touchscreen interface for daily use, while an associated smartphone app provides for management and telemetry (such as long-term biomonitoring).wikipedia
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Samsung Gear S

Samsung Gear S is a smartwatch designed and marketed by Samsung Electronics.

Tizen

LiMoLiMo operating systemSamsung Tizen OS
Tizen is a Linux-based operating system for various platforms including smartwatches.
In 2014, Samsung released the Gear 2 smartwatch, which migrated to a Tizen-based operating system as opposed to Android.

Razer Inc.

RazerRZRRazer Edge
At the 2014 Consumer Electronics Show, a large number of new smartwatches were released from various companies such as Razer Inc, Archos, and several other companies, as well as a few startups.
At the 2016 Consumer Electronics Show, Razer released the Nabu Watch, a dual-screen smartwatch: it integrates an always-on illuminated backlit display, that takes care of standard features such as date and time, and a second OLED screen, which is activated by raising your wrist and is where you can explore its smart features. It requires Android 4.3 (or higher) device with Bluetooth Low Energy (Bluetooth 4.0 or higher) capability

Consumer Electronics Show

CESSCES '94Winter Consumer Electronics Show
At the 2014 Consumer Electronics Show, a large number of new smartwatches were released from various companies such as Razer Inc, Archos, and several other companies, as well as a few startups.
Pebble announced the Pebble Steel smartwatch, which has a thin body, tactile metal buttons, and Corning Gorilla Glass.

Hyundai MB 910

The MB-910 is a tri-band/GPRS watch phone made by Hyundai Mobile Europe in Leitz Austria Vertriebs GmbH.

Android (operating system)

AndroidAndroid operating systemAndroid OS
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.

Samsung Gear Live

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.

Operating system

operating systemsOScomputer operating system
Tizen is a Linux-based operating system for various platforms including smartwatches.
Many of the same computers are also on Green500 (but in different order), and Linux runs on the top 10. Linux is also commonly used on other small energy-efficient computers, such as smartphones and smartwatches.

List of devices using Mediatek SoCs

Mediatek MT6737MMediatek MT6755Mediatek MT6757
Also in smartwatches: U Watch U8, 230 mAh and U8 U Pro3, 320 mAh.

Fitbit

Fitbit TrackerFitbit,
The company released its Fitbit Ionic smartwatch in October 2017 for $300 and this was supplemented in 2018 by the Versa, a smartwatch with a revised design and a lower price.

Misfit (company)

MisfitMisfit WearablesMisfit, Inc.
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.
The Vapor is an Android Wear-based smartwatch which was launched in early 2017 and made available for ordering from select countries on 31st October 2017.

Apple Watch Series 3

Series 3
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.

WatchOS

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

Fossil Group

FossilFossil, IncDennis Secor
In 2003, the company released the "Fossil Wrist PDA" wristwatch computer which is a tiny Palm OS-based PDA worn like a watch.

Interferometric modulator display

MirasolIMODIMOD-Mirasol
A multi-color IMOD display is used in the Qualcomm Toq smartwatch.

Touchscreen

capacitive touchscreentouch screenscreen
A smartwatch is a wearable computer in the form of a wristwatch; modern smartwatches provide a local touchscreen interface for daily use, while an associated smartphone app provides for management and telemetry (such as long-term biomonitoring).

Translation

translatortranslatedtranslators
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 WiFi/Bluetooth connectivity.

Portable media player

media playerdigital audio playersportable media players
Some smartwatches function as portable media players, with FM radio and playback of digital audio and video files via a Bluetooth headset.

FM broadcasting

FMFM radioFM band
Some smartwatches function as portable media players, with FM radio and playback of digital audio and video files via a Bluetooth headset.

Bluetooth

Bluetooth 2.1 + EDR4.0Bluetooth 2.1+EDR
Some smartwatches function as portable media players, with FM radio and playback of digital audio and video files via a Bluetooth headset.

Electronic visual display

Displayelectronic displaydisplay devices
While internal hardware varies, most have an electronic visual display, either backlit LCD or OLED or Hologram.

Lithium-ion battery

Li-ionlithium-ion batterieslithium-ion
They are generally powered by a rechargeable lithium-ion battery.