Review pitching release point on iPhone—with the right limits.
Phone video can help identify the visible frame around release and compare body position. It does not directly measure true three-dimensional release location, velocity, spin, or pitch movement.
Record enough space around the release area
Keep the pitcher’s full body, stride foot, throwing hand path, and follow-through in frame. A tight crop can hide the movement that explains the release.
Find the release neighborhood frame by frame
The ball may blur or disappear between frames. Use the last frame with the ball in hand and the first frame after separation to bracket the visible release moment.
Mark body relationships
Inspect head and trunk position, stride-foot relationship, shoulder line, throwing-hand area, and direction through follow-through.
Use pose overlays cautiously
Fast arm movement and occlusion can reduce pose accuracy. Always compare the overlay to the original frame before using it as evidence.
Compare the same pitch intent and view
Pitch type, effort, mound, camera position, and fatigue can change the appearance. Record those conditions before drawing conclusions.
Know when dedicated hardware is required
Use radar, ball-tracking systems, or qualified assessment when the question is velocity, spin, movement, exact 3D release metrics, workload, or injury.