Accurate, Simple, Professional and Personal Range of Body Motion Measurements in three dimensions planes Sagittal, Coronal, and Transverse. Set the target angle and direction with vibration notifier. With this simple app, no requirements for Blue Tooth, internet connection, synchronisation process, long battery charging sessions, worry about being close to magnetic influence, proximity to receiver, and no worries about being indoors or outdoors. Accurate and easy to measure, every time."