Apple has released a public beta of iOS 9.3. Its major new features:
iOS 9.3 is a major update to the iOS 9 operating system, introducing a long list of new features and improvements. iOS 9.3's biggest new feature is Night Shift mode, which is designed to automatically cut down on the amount of blue light an iOS user is exposed to at night by shifting to more yellow tones for the iPhone or iPad's display. With iOS 9.3, there's a number of changes for educational users, and the iPhone is now able to pair with multiple Apple Watches.
Of course, "Night Shift", as Apple calls it, is a wholesale copy of f.lux.
In any event, Apple also released a public beta of OS X 10.11.4.