Use APKPure App
Get Quickly Lock Screen old version APK for Android
한 번의 클릭으로 화면을 끄고 전원 버튼을 터치하지 않고 장치를 잠급니다
One click to turn off screen and lock device without touching power button。
Use the app first，You must activate administrator will allow the app to preform the following operation：Lock Screen.
The app is lightness and no activity.
The app is sample "ABC" locker
You just need to touch the app icon lightly，the phone screen can be turned off quickly.
AppLock can protected you applications