Introducing WatchKit for watchOS 2 – WWDC15

WWDC15WatchKit for watchOS 2 introduces many new capabilities for creating responsive Watch experiences. Beyond a faster architecture, learn about all new support for the Digital Crown, fluid animations, and media playback and recording. Find out how to make use of accelerometer and heart rate data, as well as providing physical feedback via the Taptic Engine.

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WWDC 2015 > Featured > Introducing WatchKit for watchOS 2