Simple Black Screen is an Android app developed by mxbi that does exactly what it says on the tin - it provides a simple black screen with no clutter. Its main purpose is to darken your screen without locking your phone, which may interfere with background apps. This app is especially useful for AMOLED screens as it saves a significant amount of battery life.

One of the best features of Simple Black Screen is that it is completely ad-free and does not require internet access or any special permissions. This means that you can use it without worrying about your personal information being uploaded without your consent. Moreover, it is a lightweight app, taking up less than a megabyte on your device.