Grooved: Tennis Swing Form

See your tennis swing the way a coach does. Film side-on, and Grooved traces an animated skeleton onto your stroke, measures how repeatable it is, and shows you what changed. All of it runs on your phone. Grooved is not a match-stats app. It is about the form and consistency of one stroke, which is the thing that actually makes your tennis better. SKELETON ANALYSIS Scrub your swing frame by frame with the pose drawn on, or open the contact sheet to see every keyframe at once. Backswing, contact, and follow-through are marked for you. CONSISTENCY, NOT A GRADE Grooved scores how repeatable your swings are across a session and charts it over time. It is a relative measure of your own repeatability. It is not a skill rating, and it never pretends to be one. TECHNIQUE CHECKPOINTS Pick the stroke you are working on, forehand, backhand, slice, or serve, and Grooved checks the checkpoints that actually apply to it. BEFORE AND AFTER Ghost-overlay a swing from today on a swing from your first session. Seeing your old shape next to your new one is the clearest proof that the work is landing. A PRACTICE PROGRAM THAT DOES NOT NEED A COURT Twelve guided sessions across four levels, plus drill sets built for each stroke. Start at your own level instead of grinding through the basics. When you finish, a weekly routine keeps going. LIVE REP COUNTING For the drills the camera can recognize, prop up your phone and Grooved counts your reps as you do them. For everything else it says so plainly and lets you tick the set off yourself. SHARE YOUR BEST SWING Export your cleanest swing as a vertical clip with the skeleton animating on, ready for anywhere you post. HONEST BY DESIGN No invented degrees of rotation from a side-on camera. No guessed UTR, NTRP, WTN, or ITN. No comparison against a named pro. No right-or-wrong verdict. When the footage is rough, Grooved tells you and leaves that session off your trend rather than plotting a number it does not trust. PRIVATE BY DEFAULT Your video never leaves your phone. There is no upload, no account, and no ads. Analysis runs entirely on-device using Apple's Vision framework. Available in English, Vietnamese, and Japanese. Grooved Pro unlocks unlimited analyses, your complete history and trends, the before-and-after overlay, per-metric deep dive, and reference comparison. The free tier keeps three analyses a week, the full practice program, and watermarked sharing, forever. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the period. Manage or cancel in your App Store account settings. Terms of Use: https://www.velorahealth.io/grooved/terms Privacy Policy: https://www.velorahealth.io/grooved/privacy