Screen Lock and Off - Sensors is an amazing application that allows you to lock your device and turn off the screen from your notification bar or from a widget. The best thing about this app is that it is free, so you don't have to worry about any fees. If you want to have a screen locked without restrictions, this is the best way to do it.

This is a useful app for those who don't want to use the power button of their device. The best thing is that you can use the screen lock without any limitations. The app also allows you to turn off your wifi and bluetooth.