Free, research-based swing analysis
Film a forehand, backhand or serve on your phone. Two minutes later: your Swing Score, every shot broken down, and the one fix to work on.
Biggest fix · Load & hold 62Land the split-step earlier, knees already bending. Stay down until you’ve hit the ball.
All from a real report: the clip at the top of this page.
What’s working, what to fix first, and a drill.
Tap a line to jump the video to that moment.
Fix: firm the wrist just before contact, so the hand stays in line with the forearm.
Joint strain flagged, with a fix and a stretch.
Phone sideways on a tripod, 5–6 m away, whole body in frame. Hit 8 or more shots. Set-up guide
One .mp4 or .mov, up to 3 minutes and 300 MB, and your height.
A score out of 100, every shot broken down, and one drill to try next. 1–3 minutes.
Five questions on every shot. Serves get their own.
Stance width as you load.
0.41× heightHow far your planted knee bends once your feet are set.
116°Weight transfer toward the target through contact.
16cmHow far your centre of mass drifts past your feet.
0.4cmHow much your head lifts as you hit.
4.5cmFilm one clip a week. Each report shows what moved since the last, so you can see the drill working. Every week keeps your streak alive.
Example of the weekly view, not a real player’s results.
Where sports science gives a target, we use it. Where it doesn’t, we set it from real players’ clips, checked by hand.
Martin et al. (2021), Journal of Sports Sciences 39(9) · Seeley et al. (2011), Sports Biomechanics 10(4) · Nesbit et al. (2008), Journal of Sports Science & Medicine 7(1)
Roetert, Kovacs, Knudson & Groppel (2009), Strength & Conditioning Journal 31(4) · Drillis & Contini (1966), in Winter, Biomechanics and Motor Control of Human Movement
A coaching aid from one camera, not a lab test. Every score shows how far to trust it. What it can’t do yet
Your coaches, your squads, reports only your coaches can open, and a private link for each parent.
Yes. No account, no card, no ads or ad trackers.
A phone and something to prop it on, side-on to the court, 5–6 m away. Set-up guide
Analysed, then deleted after 14 days. Terms & privacy
Every change is tested against real shots checked by hand, and each score shows how far to trust it.
Two minutes from upload to your biggest fix. Free, no account.