Lock Screen is a free Android application developed by iDOTOOLS that allows users to lock their phone screen with just one click. This app reduces the use of the power button and prolongs its working life. The lock screen experience is better in the system for Android 8.0 and above, as it has been fully optimized to adapt to more special mobile phone models.

The app uses the Device Administrator permission. If you face any problem uninstalling the app on some mobile phones, find "Lock Screen" in "Settings→Privacy→Device administrators" and deactivate it. After that, the app can be uninstalled as usual.