FormCourt: AI Tennis Coach

Film one serve. FormCourt reads knee bend, shoulder tilt, elbow and reach off the video, scores it out of 10, and builds that week's drills around your weakest link.

FormCourt turns one phone video into a coach's read of your technique.

Film a serve, a forehand or a backhand from the side. FormCourt tracks your body through the swing, measures the angles that decide the shot, and gives you a score out of 10 with the reason behind it - not a vague "work on your timing", but "shoulder line reached 38 degrees into contact; elite serves cartwheel past 35".

MEASURED, NOT GUESSED Eleven parameters per serve: weight shift, toss release, toss height, knee bend at the trophy, elbow position, tossing arm, leg drive, shoulder tilt, reach at contact, head position and the landing. Each one is graded against a band drawn from published serve kinematics, and each one shows you the number it was graded on.

SEE THE FIX, DON'T JUST READ IT Playback freezes on the frames that matter - toss, trophy, contact, landing - and draws your limb against the position it should have been in. Lime is you. Dashed is the target.

A WEEK BUILT FROM YOUR WEAKEST LINK 67 drills with step-by-step figures. FormCourt picks the ones your lowest scores ask for, works around your court days and coaching sessions, and leaves out anything your injuries rule out.

WATCH IT MOVE Every stroke you keep goes into a strength profile across serve, forehand and backhand, with the delta against your last one. Half-seen strokes are marked and left out of your trends, so a bad camera angle never moves your progress.

ON-DEVICE The analysis runs on your phone. Your video and the pose data never leave it and are never uploaded, with or without an account. Sign in only if you want your scores backed up - the app works without one.

FORMCOURT PRO Unlimited analyses, the full breakdown on every parameter, and the plan weighted to your weakest areas. $12.99 a month or $79.99 a year with one free week. Subscriptions renew automatically unless cancelled at least 24 hours before the period ends, and are managed in your Apple ID settings.

FormCourt gives technique feedback, not medical advice. Stop if something hurts.

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