If the orientation is locked, other apps can't change the orientation. For example:
Fullscreen video want change it to landscape.
This app have a widget. If you want to add widget:
Go to homescreen and hold down your finger on empty space, select widgets and slide the screen until find it
source codes : https://github.com/dogusumit/RotateScreen
![Control Screen Rotation for Apps Individually - Samsung Galaxy Note 2 [How-To] screenshot 1](https://i.ytimg.com/vi/zcKm2XlW9Nc/mqdefault.jpg)
9Apps 4.9
