Micro bit engineering design process idea

My idea is a step counter that can be used for fitness. By using the motion sensors in the micro bit I could assign a step as a certain average distance and have the micro bit count every time it is moved that amount. So you can just were it on you while your walking or jogging and it can determine how many steps you’ve taken. I could also program one of the buttons to reset the step counter. And maybe I can even have another counter that can determine how many calories you’ve burn by comparing it to the number of steps you’ve taken.