Mulltip ways to lock screen. Save the life of your power button.
Lock screen with a widget.
Lock screen from the notification bar. So you can lock screen without backing to home screen.
Lock screen by shaking phone or tablet. That's cool! You can lock screen from anywhere. Just turn the screen upside down and then rotate your wrist. 9 shake sensitive levels you can choose. So you can even rotate your wrist very slowly to lock screen.
The motion is different from general shaking, so will not conflict when you shake in other apps.
You can choose the way or use them together.

How to install
1.Open DX Lock and check Toggle Device Admin
2.Select Activate in the popup dialog (required)
3.Then you can add a widget to home screen, click it to lock screen.
4.Or enable notification lock
5.Or enable shake lock
6.Or use them together

How to uninstall
If you really don't like this app and want to uninstall.
1.Open DX Lock
2.Uncheck Toggle Device Admin
3.Uninstall as normal app

Screenshots: