The magic behind Motosumo lies in its ability to utilize the bike's vibrations in conjunction with the built-in sensors of your smartphone to calculate comprehensive cadence statistics. For this to work effectively, your phone should be placed on the handlebars of the bike in a stable position facing forward.
It is important to use a high-quality and sturdy phone mount to secure your device properly. If the phone wobbles, the signals may become corrupted, resulting in inaccurate measurements of cadence, total calories burned, distance, speed, and more.