This is a very short and simple app which lets you increase your concentration power. All you have to do is take a deep breath and look at the screen and concentrate on the white circle.
Scientists have proven that, if one does this exercise daily, then great changes are expected.
The screen will not get dim as long as the app is open.
May god bless you.
免費玩Concentration Tool APP玩免費
免費玩Concentration Tool App