Screen Keeper (Keep Screen On)

You can prevent the screen-off easily with one button.

If you want your smartphone screen to stay on, just click the "Set" button, and click the "Release" button when you are finished.

If you forgot to click the "Release" button, everything is OK. It will be automatically released when the app is forced termination.

(To avoid quitting, please keep your app multitasking during "Set" mode.)