Slow-mo, frame-by-frame, draw lines and angles, side-by-side compare
No clips yet
Record an athlete or import a clip. Everything stays on this phone. Nothing uploads.
Kept in the library here, and handed to the phone so it can go in Photos too.
Two things a known distance apart, in the plane the movement happens in: cones or lane marks along a run, a metre stick or taped marks on the rack for a lift. Then tap one, then the other.