This is a flowing sheet music app that is useful for piano solo songs from the beginning of practice to the final stage. You can choose the speed of flow. Also, movement of the score can be stopped by tapping the center of the score. You can resume by tapping on the left side of the score. This app allows you to continue practicing a specific piano piece every day, even in places where you cannot carry sheet music with you, as long as you have a smartphone and a piano in a Wi-Fi environment. It can also be used to finish memorization.