Free
$0 forever, planned
A useful first look at your swing.
- 1 swing per day
- Letter grade and handicap range
- Shareable roast card
Your AI swing coach. In the making.
Know your swing.
Own your next move.
A phone video holds more than a swing. Find the pattern, see the grade, and understand what to work on next.
Invite-only coaching experience in development.
The tracking and grading Lab is open to try.
No app installLab video stays on your device
Sample grade card
Zac / Driver / Top of backswingOverall gradeB-
Handicap guess11range 8-14
Centered and quiet on the way back, then he stands up through the strike.
Case study #1. AI opinion, not an official handicap.From one swing
to a clearer read.
You bring the phone. We make the movement easier to see.
- 1
Film
One swing, head to feet. Keep the phone still, face-on or down the line, with room for the whole club.
Under 20 seconds. Good light helps. - 2
Track
The Lab finds the joints and swing phases, then estimates tempo, posture and movement from your clip.
Runs in your browser. No video upload. - 3
Coach read
Turn the evidence into a priority and a practice feel. Zac's case study shows the direction we're building toward.
For now, the Lab gives grades and a roast card.
Case study #1
Meet Zac.
One golfer. Two sessions.
A driver, an iron, and a pattern hiding in both. This is our first complete AI coach read, built from tracked clips and a separate review of key frames.
“The tempo is there.
The posture gives way.”
Driver tempo3.0 : 1Backswing / downswing
Iron shoulder turn92°Model-derived 3D estimate
His iron head rises 9.7 cm from address to impact on the assumed height scale. The priority: keep the belt buckle back through the strike.
Zac's coaching dossier
Three priorities. A plan to test.
These priorities and stroke costs are AI coaching opinions from two clips. They are hypotheses to test, not measured scoring losses or promised improvements.
Explore the comparison and three-week plan
Driver vs iron: two club habits
| Metric | Driver | Iron | What it says |
|---|
The plan
Three weeks, every drill tied to a number
What he already owns
Archetype
Open Zac's full interactive report Film, 3D model, telemetry, grades and share card
Film room
Every frame, tracked
Teal skeleton, yellow spine axis, grey ghost = where he started. The hand trail heats from green to red as speed climbs.
360 orbit
Walk all the way around his swing
A model-derived 3D skeleton estimated from the phone video. Depth can be wrong, especially from face-on. Drag to orbit, scrub to move through the swing. Gold = hips, teal = shoulders: the gap between them is the coil.
Telemetry
The numbers under the swing
Hand speed through the swing
Lead/trail hand midpoint, m/s, scaled to a 6'0" frame. Bands mark each phase.
Tempo
Backswing time vs downswing time. A 3 : 1 ratio is used here as a coaching reference, not a rule for every player.
Tracked measurements and reference ranges
| Metric | Clip | Zac | Reference window | Read |
|---|
Report card
A grade, with the evidence beside it
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OVERALL
The newer dossier treats face-on knee flex as a camera artifact. Use that view-specific interpretation when reading the original setup grade. Experimental scores and reference windows are not independently validated.
Uncharted
Five experimental movement scores
The handicap read
Estimated handicap
A swing-based guess, not a verified playing index. Clubhead speed and carry below are coaching estimates, not launch-monitor measurements.
The roast
The roast
Delivered with love. Share responsibly.
One camera.
A useful view, with limits.
We show the evidence and say where it runs out. A grade is a coach's opinion, not a launch monitor.
What it can show
- Timing and rhythm. Swing phases, backswing time and downswing time.
- Visible movement. Joint angles, projected head rise, sway and posture from the right view.
- Patterns worth testing. A tracked replay, a grade and a starting point for practice.
What it cannot promise
- True club or ball data. No measured clubhead speed, spin, carry, pressure or impact force.
- Reliable depth from every angle. Face-on rotation is unreliable. Down-the-line 3D is still a model estimate.
- Your playing handicap. The guess is not an official index and has not been calibrated against a large player set.
Read the method and sources of uncertainty
Tracking. Zac's offline report uses YOLO11-x pose with 17 joints on each frame, isolating the golfer from onlookers, plus MediaPipe Heavy for a model-derived 3D skeleton. Swing phases come from hand motion and height. The browser Lab uses MediaPipe Full and the shared grading engine; it does not perform Zac's separate AI key-frame review.
Measurement. Angles and distances come from tracked joints and depend on camera position and tracking quality. Zac's distances assume a 6'0" height; the Lab uses your selected height. Speeds are projected hand speeds, a lower-bound estimate, not clubhead speeds. Zac's driver is 24 fps, so timing is about ±40 ms.
Judgment. Grok reviewed Zac's raw and tracked key frames alongside the metrics. Its grades, flight interpretations, stroke costs and drills remain coaching opinions. Reference ranges and the handicap formula need independent calibration. Use the right camera view and review important changes with a qualified golf coach.
Start with a swing.
Build a practice habit.
Planned launch tiers. No payment is collected here. Pro features are in development.
Pro
Planned$9.99 / month
or $59 / year. Proposed pricing.
- Unlimited swings, history and trends
- Driver vs iron and past-self comparisons
- Full drill plan and down-the-line 3D rotation
Invite-only early access
Be part of
the first group.
We're building a coach you can take to the range. Early access will open in small groups while we test the reads and improve the product.
The prototype Lab
See what your swing reveals.
Try browser-based tracking, grades, a handicap guess and a roast card. This prototype does not include the full AI coach read shown in Zac's case study. Your video stays on your device.
Before you film: keep the phone still at about hand height. Include your whole body and club, use good light, and trim to one swing under 20 seconds. Choose face-on for sway and tempo, or down the line for posture and estimated rotation.