to build apps that run natively on the smartwatch, instead of having to rely on an iPhone. This change should result in better performance, and should have been there from day one. Developers will also be able to integrate key hardware features like the digital crown, heart rate sensor, accelerometer and microphone in their apps using an upgraded version of the WatchKit framework. The new ClockKit framework will let them post information on the clock face. The iOS 9 SDK beta including WatchKit for watchOS 2 is available for download from Apple's developer website.
Tools for fitness and home automation apps got revamped
The iOS 9 SDK also includes upgraded versions of many of Apple's other frameworks. There are new HomeKit profiles for motorized windows and shades, motion sensors and home security systems. New HealthKit data points make it possible to store information on reproductive health, UV exposure and water intake. Using GameplayKit, developers will be able to build better games, and then use ReplayKit to add video recording features.
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