Review: WatchOS 2 offers timely (and needed) tweaks
WatchOS 2 is the second version of the operating system that powers the Apple Watch lineup, and it arrives about five months after the wearable's debut -- and five days after it was originally expected. Even though it's been only a few months since supplies caught up with the initial high demand, development of the underlying operating system has continued.
watchOS 2.0 is downloaded using the Watch app on the iPhone.
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