It is a simple app that can be switched at the touch of a button the brightness of the screen.
It is possible to set in advance the brightness setting of the free eight
You can switch at the touch of a button with a large button.
You can also set the brightness to Auto.

*To those who use it on Android 6.0 or higher.
In this application in order to change the brightness setting of the terminal
Enable "write permission of system setting" for application
It is necessary to do.
Since the setting screen opens at the first startup of the application please set it.