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watchOS is the operating system of the Apple Watch, developed by Apple.It is based on iOS, the operating system used by the iPhone, and has many similar features. [4] It was released on April 24, 2015, along with the Apple Watch, the only device that runs watchOS. watchOS exposes an API called WatchKit for developer use.
The iPhone 5s and iPhone 5c were announced on September 10, 2013. The iPhone 5s included a 64-bit A7 processor, becoming the first ever 64-bit smartphone; [29] it also introduced the Touch ID fingerprint authentication sensor. [30] The iPhone 5c was a lower-cost device that incorporated hardware from the iPhone 5, into a series of colorful ...