watchOS

watchOS
The word "watchOS" in black San Francisco neo-grotesque sans-serif font
DeveloperApple
Written in
OS family
Unix-like, iOS based on Darwin
Working stateCurrent
Source modelClosed, with open-source components
Initial releaseApril 24, 2015 (2015-04-24)
Latest release26.5[1] (May 11, 2026 (2026-05-11)) [±]
Latest preview27.0 beta 2[2] (June 23, 2026 (2026-06-23)) [±]
26.6 beta 2[3] (June 15, 2026 (2026-06-15)) [±]
Marketing targetSmartwatch
Available in45 languages[4][5]
Update methodOTA (via iPhone 5 and later running iOS 8.2 and later)
Platforms
  • ARMv8-A (5.0–present)
  • ARMv7-A (1.0–8.8.2)
Kernel typeHybrid (XNU)
Default
user interface
Cocoa Touch (GUI)
LicenseProprietary software except for open-source components
Official websiteapple.com/os/watchos

watchOS is the mobile operating system of the Apple Watch, developed by Apple Inc. It is based on the iOS operating system and has many similar features. It was released on April 24, 2015, along with the Apple Watch, the only device that runs watchOS.

The second version, watchOS 2, included support for native apps that could be made for the Apple Watch and other improvements, and was released on September 21, 2015. The third version, watchOS 3, was released on September 13, 2016, It had better performance and including new watch faces and stock apps. The fourth version, watchOS 4, was released on September 19, 2017. The fifth version, watchOS 5, was released on September 17, 2018, adding more support for apps that could be made for the Apple Watch and new workouts, along with the “Walkie-Talkie” feature.

References

  1. ↑ Clover, Juli (May 11, 2026). "Apple Releases watchOS 26.5 With New Pride Luminance Watch Face". MacRumors. Retrieved June 9, 2026.
  2. ↑ Clover, Juli (23 June 2026). "Apple Seeds watchOS 27 Beta 2 to Developers". MacRumors. Retrieved 28 June 2026.
  3. ↑ Clover, Juli (26 May 2026). "Apple Releases Second watchOS 26.6, tvOS 26.6 and visionOS 26.6 Betas". MacRumors. Retrieved 28 June 2026.
  4. ↑ Johnson, Dave; Lynch, John (October 8, 2019). "How to change the language on an Apple Watch, and make it differ from the language on your paired iPhone". Business Insider. Archived from the original on October 9, 2019. Retrieved September 21, 2020. Your Apple Watch is designed to "mirror" the language used on your iPhone, so by default it'll use whichever language is set on that device, but you can make the two devices differ.
  5. ↑ "Apple – iPhone XS – Technical Specifications". Apple. Archived from the original on January 4, 2019. Retrieved January 4, 2019.

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