Set Orientation is the best application on Google Play Store in its field. NO ROOT REQUIRED.
Set Orientation allows you to force your device into a particular screen orientation.
Help in using the phone when charging slot is at bottom and you want to use your phone while charging..
Choose an orientation or just click on Automatic (full) and upside down the phone. Now charging wire is connecting at top. So easy !!!
App even change the orientation of Lock Screen.
The application force other applications to change their orientation.
And Menu and App Drawer.
It is easy to use and have size of less than 1 MB.
Download: Set Orientation.