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first version of watchOS 1 was 1.0 and was based on iOS 8.2. The second version of watchOS 1 was 1.0.1 and was based on iOS 8.3.

watchOS 2

watchOS 3

watchOS 4

watchOS 5

watchOS 5 was first shown to the public at the 2018 San Jose WWDC developer conference held on June 4, 2018, by Apple. It had an instant watch-to-watch Walkie-Talkie mode. With this release, Apple dropped support for the first generation Apple Watch. watchOS 5 was the first version of watchOS to bring 64-bit support.

watchOS

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