To conserve power and extend battery life, the system reduces power to the computer if it does not detect any user activity for a certain amount of time. Depending on system power settings, the display may first be dimmed, a screen saver may be displayed, and eventually the display may be turned off as the system enters a low-power sleep state. PlatformVersion supportedAndroidAndroid 4.4 and lateriOSiOS 9.0 and latertvOStvOS 9.0 and laterWindows UWPWindows 10Windows StoreWindows 8.1 or laterWindows Phone StoreWindows Phone 8.1 or laterWindows Phone SilverlightWindows Phone 8.0 or laterWindows (Desktop Apps)Windows Vista or later