Track your wall rally, live.

Prop your phone up facing the wall and yourself, hit record, and Stroke Lab logs every stroke as you play — count, forehand/backhand split, estimated speed, and where the ball is landing.

Manual tap — you tap a button each time you strike the ball; fast, reliable, works in any light.

Auto (beta) — the app watches the video feed for a moving yellow-green ball and logs strokes on its own. It's a rough, single-camera estimate: it can miss fast shots or get confused by similarly coloured backgrounds, so treat its numbers as approximate, same as the speed readout.