Settings App is a lightweight piece of software that helps you in the process of creating and managing multiple combinations of settings for your installed applications. It gives you the ability to create an independent profile for each of your apps, allowing you to adjust aspects like network conditions, screen brightness, volume, Bluetooth connection, and more. All these actions can be achieves by accessing the minimalistic user interface.
This software also requires the user to configure a default profile which is used only when the screen is off, and when other applications are used without having customized profiles. The main duty of this software is to give you some control regarding the battery usage of your installed packages in certain tasks. Another cool feature is the ability to trigger profiles based on time range.
If you don't want to use this component, then the profile switching is always enabled. Settings App rocks a lightweight built and it should run fine even if your Android device is a bit older.