An AI badminton coach that watches every rally
Badminton Sensei is an AI badminton coach app that learns from your real matches, not a generic plan. It watches every rally you film, measures your shot mix, smash speed, rally lengths and court coverage, and turns the patterns into plain-language Coach's tips.
- Built on your own games
- Coach's tips
- Progress over a season
- Free on iPhone
Nobody watches every game
A good coach changes your game by noticing things you can't see from inside a rally. But lessons are an hour a week at best, and club night is where you actually play. Nobody is watching those games, and your memory of them is a highlight reel of your two best smashes and the shot you shanked at 19–19.
So you guess. You feel like your smash got faster. You think you lose the long rallies. You're sure your clears are deep. Some of that is true, and some of it is the story your memory likes.
What Sensei does
Evidence, every session
Prop the phone up and play. Sensei tracks every shuttle, names every shot and keeps the score, then tells you what actually happened, with numbers and with the video of the rallies that prove it.
The things a coach would point out
Your shot mix
How often you smash, clear, drop, lift, drive and play net shots, per player.
Rally lengths
Short and long rallies, your longest of the night, and how they ended.
Court coverage
Where you moved and where your shots landed, on a map of the court.
Progress
Top smash, win rate and longest rallies, match after match.
Personal bests
Bests, streaks and badges that make the next session worth turning up for.
Patterns, in plain language
Not a wall of charts. Short notes about your game, written like a coach would say them. Examples of the kind of tips you'll see:
Lifts
81% of your lifts went deep
Deep lifts push your opponent to the back and buy you time to recover. Keep doing it.
Shot mix
A third of your shots were lifts
That's a lot of defending. Look for chances to play a net shot or drive instead of lifting.
Rallies
You won most of the short rallies
Your first few shots are working. The long rallies are where the points got away.
Tips are written from the stats of your own matches; the wording above is illustrative.
See if it's working
Worked on your smash all month? The chart will tell you. One match is a snapshot; ten matches is a trend. Sensei keeps every match on your phone so the progress view gets more honest the more you play.
- Top smash, win rate, rally length and shots charted
- Personal bests and streaks
- Every number linked back to the match
How you learn from a match
| Question | Badminton Sensei | Typing scores into a scoreboard app | Reviewing video by hand |
|---|---|---|---|
| What you learn | Shot mix, speeds, rallies, coverage, tips | Who won | Whatever you spot and write down |
| Effort after playing | None; read the tips | None | An evening per match |
| Spotting patterns | Written for you from the data | Not possible | Possible, if you're disciplined |
| Progress over months | Charted automatically | Win/loss record | A spreadsheet you maintain |
| Proof | Jump to the rallies behind a stat | None | Yes, once you find them |
| Bias | Counts every shot the same | None | Your memory picks favourites |
What an AI badminton coach app can and can't do
“AI coach” gets used for a lot of things, so here's exactly what it means in Badminton Sensei. The AI is computer vision: a neural network that tracks the shuttle, Apple Vision following the players, and court mapping, all running on your iPhone. From that it builds a factual record of your match. Coach's tips then look for patterns in that record and describe them in plain words.
What it doesn't do is just as important. It doesn't replace a human coach correcting your grip or your footwork in person, and it doesn't invent a training plan it can't justify. It doesn't chat. And it never pretends to be surer than one phone camera can be: uncertain smash speeds are marked, and line calls too close to judge say “Too close”.
Using it as a badminton training app
Sensei tells you what happened. The training is still yours, and that's where the rest of this site helps. If your shot mix shows you lift a lot under pressure, work on your net game with the beginner drills and their session builder. If the coverage map shows you're late to the back corners, try the footwork drills you can do at home. If your smash speed has stalled, read how to smash harder, then film again and see if the number moves.
A simple weekly loop
- Film one match at club night, phone behind a baseline.
- Read the tips and pick one thing to work on.
- Drill it for a week.
- Film again and check the same stat. Repeat.
A badminton trainer app for doubles, too
Doubles is where patterns hide best, because there are two of you to blame. Sensei detects doubles from the video and keeps stats per player, so you can see who's doing the lifting and who's finishing the points. Pair it with our doubles strategy guide to turn the numbers into positions.
A coach that doesn't talk about you
Your matches, stats and tips are worked out on your iPhone and stay there. No account, no cloud profile, no ads, no analytics. Read the privacy policy.
Analysed on your iPhone
Core ML and Apple Vision do the work on the phone in your hand.
No account, no server
Nothing to sign up for and nowhere for your videos to be sent.
No ads, no tracking
No analytics or advertising SDKs. The App Store label is “Data Not Collected”.
Works with no signal
Basement hall, school gym, holiday court: it doesn't need the internet.
Start your first season
- Step 1
Try the sample match
See stats, Coach's tips and highlights from a bundled match in seconds.
- Step 2
Film your next session
Phone behind a baseline, a few feet up, whole court in view. 120 fps for verified smash speeds.
- Step 3
Come back weekly
The more matches, the clearer the patterns and the more honest the progress charts.
Step-by-step help: getting started and where to put your phone.
Frequently asked questions
Is there a free AI badminton coach app?
Badminton Sensei is free on iPhone with every feature included: shot tracking, smash speed, stats, progress charts and Coach's tips. No ads, no subscription and no in-app purchases.
Does it replace a real coach?
No. It gives you an accurate record of what happened in your matches and points out patterns, which makes lessons more useful. It doesn't correct technique in person.
Does it work for doubles?
Yes. It detects doubles from the video and keeps stats for each player, as well as the doubles score with servers and service courts.
Does it work on Android?
No. Badminton Sensei is iPhone only and needs iOS 26 or later.
Do I have to wear a sensor?
No. Everything comes from the iPhone's camera. No wearables, racket sensors or accounts.
Does it give me drills or a training plan?
It gives Coach's tips: plain-language patterns from your matches. For drills, use the free guides on this site, then film again to see the effect.
Is my data used to train AI?
No. Nothing leaves your iPhone. The app collects no data, has no server and makes no network requests.
Stop guessing. Start seeing.
Get a coach's eye on every game you play. Badminton Sensei traces every shuttle, clocks your smashes, calls the lines and keeps the score, all on your iPhone.
Coming soon to theApp StoreFree · iPhone with iOS 26 or later- On-device AICore ML tracking, nothing uploaded
- No account, no adsEvery feature, every match, free
- Works with no signalAny gym, any court