Lock Screen App can lock your device easily. ## ↓↓Scroll down↓↓ to read Notes on Uninstall. ##. Do you feel inconvenient to lock your device using the power button? Are your afraid of wearing out the power button? (My n1 was repaired coz of that: < ). 'Lock Screen App' is a tiny app that can help you lock easily (without power button). Features: Lock device with one touch.