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Now coaching · Tennis serve

Every rep, seen.

Repgroove watches your serve the way a coach would, then tells you the one thing to fix next, and proves it's working.

AI-generated athlete · live analysis from Repgroove's pose engine

The gap

You've hit thousands of serves. Almost nobody was watching.

1 : 8

One coach, eight players. A couple of minutes of real attention each, per hour.

$80–150

For an hour of private coaching. Most players never book one.

0

Feedback on the reps in between, where a bad habit quietly gets grooved in.

See it work

One serve, coached.

This is what Repgroove sees. Every number in the film was measured by our pose engine on this clip: the dropped elbow, the one fix, and what changed twelve sessions later.

One thing at a time

One fault. One drill. No report card.

  • The biggest thing first. Each session surfaces the single fault holding you back most, not twelve at once.
  • A coach's words, not a chatbot's. Cues and drills come from your sport's pack, written by coaches. The AI only chooses among them.
  • Stay on it until it's clean. You move on when it measures clean twice, not when you get bored of it.
Today · Session 01Tennis serve

Elbow drops at trophy

A low elbow shortens the throwing motion, so you push the ball instead of throwing the racket up at it. Serves land short or in the net and the shoulder takes the load.

56°arm lift · aim for 95°
“Elbow up to the shoulder line, hold, then swing.”
Wall trophy holds3 × 10 · 6 min
Progress you can see

Measured, not claimed.

Session 1: at the trophy position the hitting elbow sits low.● Session 01 · Trophy
Arm lift Flagged56°
Knee bend Flagged169°
Session 12: deeper knee bend, elbow a little higher.● Session 12 · Trophy
Knee bend Fixed150°
Arm lift Next focus61° +5°

Real measurements from Repgroove's engine on AI-generated footage of the same player. Your baseline and every session after it land on one trend line, and the fault we flagged should shrink faster than the ones we didn't.

How it works

Useful before you press record.

Step 01

Pick your skill

Tennis serve or bodyweight squat today, more on the way. Your sport's pack decides everything after.

No camera
Step 02

Two-minute baseline

A short intake: level, how often you play, what you're working on. You get your likely top fault and one drill today.

No camera
Step 03

Film a few reps

A live framing guide gets you in shot. Pose runs on your phone and confirms or corrects your top fault with evidence.

When you're ready
Private by design

Your video never leaves your phone. Only the skeleton does.

Pose estimation runs on the device. What we analyse is joint positions over time, like the lines on the left, plus one still frame for your history.

One engine, every sport

Built with coaches, for their sport.

Sports

Each sport is its own pack.

Phases, faults, cues and drills, drafted from public coaching knowledge and refined by a partner coach. A swimmer and a tennis player each get an app that feels built for them.

  • Tennis serve● Live
  • Bodyweight squat● Live
  • FreestyleSoon
  • Free throwSoon
For coaches

See every student's top fault before class.

Share your code. Students start with the same $1 week, and your roster shows each one's top fault and sessions. You earn 20% of their subscriptions, paid monthly.

8students on your code
$30.40a month to you
Start coaching for $1
Pricing

One price, after a $1 week.

Member
$19a month, after 7 days for $1
  • Every sport, unlimited sessions
  • Video analysis with the skeleton overlay
  • Your full history and trend line
  • Cancel anytime. No annual plan, no credits.
Start your $1 week
Coach · same $19

Any member can coach.

Earn 20% of your students' subscriptions. Five students cover your own membership.

Clubs · $15 a seat

Academies and clubs.

Member seats in blocks of 25, with your own branded packs and reporting.

Questions

Asked, answered.

Do I need a camera?

No. Pick your sport, do the two-minute baseline, and you get a plan with one fault and one drill today. Add video whenever you're ready, from any phone or action-cam clip.

Does my video get uploaded?

No. Pose estimation runs on your phone, so the video never leaves it. Only the skeleton (joint positions over time) and one still frame are sent for analysis.

Is the athlete on this page real?

No. The footage is AI-generated so we could show a full before-and-after without filming a real player. The analysis isn't: every angle and flag on this page is what Repgroove's engine measured on that footage.

Which sports?

Right now tennis serve and bodyweight squat. Freestyle and free throw are next. Each new sport is a pack, not a new app.

Can I cancel?

Yes. It's $1 for your first week, then $19 a month, billed monthly. Cancel anytime.

I'm a coach. How do I get paid?

Invite students with your coach code. You earn 20% of the subscriptions attributed to you, paid monthly.

Groove the right rep.

Pick a sport. Get your plan in two minutes. No camera needed.