Point your phone at a goal. Mark the 4 corners, pick the ball colour, and it tracks shots — drawing the flight path, finding where the ball crosses the goal, tracking the keeper, and scoring each shot out of 10.
No need to pick — after the camera opens you'll tap your actual ball once so it learns that ball's exact colour, in your lighting. Works for any colour.
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Defaults = full-size goal (7.32 × 2.44m). For a small goal, enter its real size — that's what scales the speed.
Honest note: one camera can't sense true 3D depth, so the goal is treated as a flat plane. "Goal / no goal" is decided by whether the ball's path crosses inside the 4 corners; the hit-spot and speed are measured on that plane. Best filmed roughly side-on or behind the shooter, in good light. Up to 2 people are tracked (17 body points each).