> I don't even think Apple currently has a compatible cadence sensor? It doesn't sound like it would be too hard to do this with computer vision. I guess it wo

> I don't even think Apple currently has a compatible cadence sensor? It doesn't sound like it would be too hard to do this with computer vision. I guess it would depend on whether the device is positioned where it can see your legs -- or you might be able to figure it out by observing head or shoulder movement.