WatchOS 3

WatchOS 3 is the third-generation OS for Apple Watch that was designed, developed and distributed by Apple.

History
watchOS 3 was announced at the 2016 Worldwide Developers Conference.

watchOS 3.0 Beta 3

 * Based on iOS Version 10.0
 * Release Date: July 18th, 2016
 * Build Number: 14S5290d