Different applications require various configurations and settings. And with the help of the settings app - All settings app, no need to open all apps as you can do it in one click.  It has settings for volume, orientation, Bluetooth connectivity, network conditions, screen brightness, and keeping the screen awake, among other things.

Because you don't have to manually turn off system functions, you can save time and battery life. When necessary, you can lower the screen's brightness and turn it back off in the default profile. Make sure you remember to turn off some energy-wasting technologies, such Wi-Fi and Bluetooth.