watchOS

From The Apple Wiki
watchOS
DeveloperApple Inc.
Written in
OS familyiOS-based (Unix-like)
Working stateCurrent
Source modelClosed source
Initial release24 April 2015
Update methodOTA Updates
Package managerApp Store
PlatformsApple Watch
Kernel typeHybrid (XNU)
Default
user interface
Carousel
LicenseProprietary
Official websitewww.apple.com/watchos

watchOS is the Operating System that is used by the Apple Watch. It is a stripped down version of iOS. The first version released was stylized and marketed as Watch OS 1.0, which was based on iOS 8.2.

watchOS 1.0.1 enabled users to view diverse emojis and fixes a few bugs and performance issues.