When you turn off the screen by pressing the power button to ver 3. 0 during the self-timer countdown, it has been improved to work properly. However, the terminal 4. 0 or later only has been able to operation check android version. (If one of the 4. 0 generation does not work properly, there is it depending on terminal) The terminal of the 2. 0 generation, because there is the case that sound or no sound by the terminal, time has come, please use in the state in which to turn on the screen. While the timer is running (not the background) state that launched the app, has become to the settings screen does not turn off. Is repeated in the time you are set, such as sports and study, practice and a break, this app is an interval timer. Are you studying or sports you efficient? It is said that the concentration of human, 30 minutes, and have only 90 minutes at the longest. Motivation also will be broken concentration is Cut Off, work efficiency will become more and more evil. How to recover the power of concentration, it is to take a break right out. Taking an appropriate interval, will bring great effect that adding sparkle or study your training, you are working efficiently. There are no complicated settings and features in this app. With the simple design, it has been improved visibility and functionality. Background so you can change the color of your choice, please study sports and fun to liven up the mood. Use. Muscle training, exercise, fitness. Combat Boxing, wrestling, and judo. Study or work. Play games, etc. Feature. The setting is simple. I have excellent visibility character is greater. Can be the design of your choice by changing the background. Timer sound realistic.