Should be fine on round watches also. Top hand is hours, middle hand is minutes, left hand is power reserve (battery). Right hand is "trust" indicator. I had no idea how to relate this to a smartwatch so it is simply a mirror of battery. You could easily change it to phone battery if you want. Two of the tourbillon parts were borrowed from Nite Owl with his kind permission. The tourbillon code was adapted from one of Toon's faces. 12h Time, Battery Level