This app is matched to Swalle ball through bluetooth. the ball can be controlled by this app. The following description is the features and functionality. First, After loading, the next step is to connect the bluetooth device - the Swalle ball. we will into the main menu interface which including all functions: controlling,game center,music player,setting. From the main menu interface we also can find a notice showed on the northwest corner that tell us the name of the ball. After the device be connected,the notice table will dismiss. The first function is controlling, we can make the ball run forward , backward,turn right,turn left by touching or stretching the relative buttons . Second, The game center including 3 games: free dancing, piano, golf. we can let the ball dance on the ground, and play the piano keys and play golf. Third,we can play music by the music player function, while the ball will shine with colorful flashing. Fourth, we can adjust the parameters of light color(red,green,blue), running speed, spin speed. That is the description of this app. thanks.