Note : Doesn't work on devices with fingerprint sensor.
Donate: Lock It: Screen Off - Donate
No more clicking the power button, one click is all you need to turn off screen.
Lock It is a very small app while being efficient.
For android versions 4.1(Jelly Bean) to 5.1.1(Lollipop) : Swipe up from the home button to lock screen quickly
For android 6.0(marshmallow) & above : Choose default assist app and then long press the home button to lock the screen.
To uninstall : Go to Settings -> Security -> Device administrators -> deselect Lock It then uninstall in normal way.
Keywords: One click, One tap, quick lock , screen off, lock phone