WatchOS 3

watchOS 3 is the third major release of watchOS for the Apple Watch series developed and distributed by Apple Inc. It was announced at WWDC 2016 alongside iOS 10, tvOS 10 and macOS Sierra preceding a developer beta and released on September 13th to the general public of the same year. WatchOS 3 was the predecessor to watchOS 4 and the successor to watchOS 2.

Product history
watchOS 3 was derived from iOS 10; both were announced on June 13, 2016 at the 2016 Worldwide Developers Conference.

Supported models

 * Apple Watch (original)
 * Apple Watch Series 1
 * Apple Watch Series 2