Apple has introduced a few new features to its iOS 9.3 beta including a "Night Shift" mode that automatically adjusts the colours of iPhone and iPad screens based on what time of the day it is. Sounds familiar? It's basically the same thing as what f.lux has been offering on Macs and jailbroken iOS devices for years.
Blue light emitted from computer and phone displays can disrupt people's sleep cycles and f.lux was originally released as a tool to combat this issue by making the colour of displays adapt to the time of day. The backlight becomes warmer at night to make it more comfortable on the eyes. For iOS devices, f.lux has been available in the jailbroken app store Cydia since 2011.
F.lux developers did try to release the app legitimately in Apple's App Store late last year but it was pulled after Apple said it violated the Developer Program Agreement because it required users to sideload it onto devices. Now Apple has developed its own version of the app as a built-in feature called Night Shift mode in the iOS 9.3 beta.
Developers now have access to Night Shift mode, along with other new features, by downloading the iOS 9.3 beta from the Apple Developer Center
[Via Apple Developer Center]