This educational app allows users to experiment with the rolling motion of a cylindrical object. The device should be fixed to the base of the object. The app runs either in Single Device Mode or in Bluetooth Connected Mode. In the Single Device Mode, position and velocity data is recorded at regular time intervals and can be exported as a CSV file for mathematical analysis. The Bluetooth Connected Mode requires two devices, one acting as a sender and the other as a receiver. The sender collects data and the receiver visualizes it in real-time. This mode would be particularly useful in teaching of position-time and velocity-time graphs.