
On Monday, Apple shipped out iOS 9.3 beta 2 to developers alongside watchOS 2.2 beta 2. The new iOS beta firmware adds a new toggle for Night Shift mode in Control Center.
Enabling Night Shift mode changes the amount of blue light emitting from a device at a given time. Studies have show that blue light can disrupt a person's sleep and circadian rhythm.
iOS 9.3 can now be updated by developers running the first beta via Over The Air update.