Results
A score, the pillars under it, one thing to fix.
0.0
Grade A · 14 strokes · 18.9 spm
TechniqueA · 97
Consistency0
Efficiency0
One thing to fixmost points at stake
Forward body angle
You 34°Target 17–33°
AI rowing video analysis · erg, on-water and crews
Grade every stroke.
Film a piece on your phone. Mocta-X grades the catch, drive, finish and recovery of every stroke and tells you the one thing to fix. On the erg, on the water and across the whole crew.
Free plan · no card · try a clip without signing up
Crew sync
94/100
8 rowers · 11 strokes
Fix first
Seat 2
±62 ms against Stroke
A coach can watch one rower at a time. A phone can watch the whole boat. Mocta-X turns every stroke it sees into one clear thing to fix.
Film any piece
Erg, single or eight. Side-on, on the phone you have.
Graded stroke by stroke
Catch, drive, finish and recovery, each one scored.
One thing to fix
Ranked by the points it costs, with a cue to row.
Built for crews
Every seat timed against stroke, every athlete in one room.
Built for rowing first. The same engine grades running gait and golf swings.
Capture
Film it on the phone you already own.
Prop the phone side-on and press record. Mocta-X finds the athlete, tracks every major joint through the clip and checks the footage is good enough to grade before it scores a single stroke.
- Any phone camera. No markers, no sensors
- Erg, single sculls and full crews
- A capture check runs before any grade
- Clips are private to your account
Grade
Every stroke gets a grade.
Each stroke is split into catch, drive, finish and recovery and scored against target bands from rowing research. The weights are published, so a grade is never a black box.
- Catch, drive, finish and recovery, scored
- Every checkpoint against its target band
- Weights open in the scoring guide
- No grade where the clip can't support one
Coach
One thing to fix, and the frame that proves it.
The AI coach reads every graded stroke before it says a word. It ranks faults by the points they cost, gives you one to work on with a cue to row by, and cites the stroke and frame behind each claim.
- Ranked by the points at stake
- Cites the stroke and the frame
- A drill and a cue for each fault
- A PDF report to hand to your coach
Crew
Eight seats. One boat. Measured together.
Film the boat side-on and Mocta-X tracks every rower, names each seat and times every catch against Stroke. Coaches see who is early, who is late and who to fix first, with the whole squad's sessions in one film room.
- Every seat tracked and named
- Each catch timed against Stroke
- A crew sync score out of 100
- One film room for the whole squad
Around the app
A closer look at every stroke.
Speed & sequence
When your legs, back and arms move fastest.
Stroke 1 · best
LegsBackArms
Drive
Legs → Arms+back
Recovery
Arms → Body → Knees
Stroke by stroke
Every check on its target band, every stroke.
1
100
2
100
3
98
4
99
5
99
6
97
7
96
8
98
9
97
10
97
11
95
12
96
13
96
14
95
Stroke 1 of 14
Forward body angle32.5°
Shin angle10.7°
Arms extended175.4°
Knee compression44.8°
Layback23.6°
Running
Every stride measured, each metric on its band.
Demo analysis · 30 fps, contact timing approximate
Form
88 A-
Cadence
153spm
Trunk lean
2.2°
Boat sync
Eight rowers, each catch timed against Stroke.
Live skeleton
Every joint, tracked through every stroke.
Body
—
Knee
—
Arm
—
catchdrivefinishrecovery
…Ability profile
Six qualities, read from one session.
AI coach
Reads the whole boat, then names the first fix.
Coach's read · 8 seats · 11 strokes
PM5 erg
Pair a Concept2 and every piece is logged.
Widgets
Your next session, streak and last score.
Live Activity
Watch a clip become a grade from the Lock Screen.
Friday 9 October
9:41
Uploading· 2%
Sending your clipTechnology
Built like an instrument.
A phone clip goes through the same five steps every time, on our servers, in about the time the piece took to row.
- 01Find
8 rowers · seats namedFinds the athlete, or every rower in the boat, and holds on to each one through the clip.
- 02Track
Zooms in on each athlete and reads every major joint at full resolution, so a sculler filmed from the bank reads as cleanly as an erg.
- 03CheckSide-onDistanceFeet in shotStrokes to grade
Corrects every angle for the camera's shape and checks the footage. Too far, too angled or feet out of shot, and it says so instead of scoring.
- 04GradeStroke 1 · four phasesCatchDriveFinishRecoveryEvery stroke, graded
Splits each stroke into catch, drive, finish and recovery, and scores every check against target bands from rowing research.
- 05ExplainCoach's read
The coach queries the graded numbers before it writes, then cites the stroke and the frame behind each claim.
Accuracy
Measured, not eyeballed.
A score is only worth chasing if it means the same thing tomorrow. So we re-grade our own sessions, check the numbers against a lab, and refuse to grade footage we can't read.
Repeatability
2.6points
The average change when the same clip is graded again. Across all 57 stored rowing sessions, re-grading used to move a score by up to 24 points. Now the worst case is 3.
Before calibrationworst 24 · average 2.6
Nowworst 24 · average 2.6
0510152025
points of spread, same footage graded twice
Against a lab
77.6 mmMocta-X
77.2 mmLab treadmill
0.4 mm apart
One runner's vertical oscillation, predicted from a phone clip, against a commercial instrumented-treadmill report.
Before any grade
- Filmed side-on
- Close enough to read
- Feet in shot
Score withheld
Re-film with the whole slide and both feet in frame.
A clip that fails the check gets what to fix, not a number it can't support. An example of the check; it also looks at the stroke count.
860
runners behind the running targets
Published equations, fitted to your sex, age, height and pace instead of one band for everyone.
2.2°
error we refused
Re-encoding a clip shifted knee angles by 2.2°, so the grading path never re-encodes your video.
Open
every weight and band, published
The scoring guide lists every check, its target band and how much it counts. No black box.
Internal measurements, not peer-reviewed results. The running cohort is from the Orthopaedic Journal of Sports Medicine, 2023 (n = 860). Methods, sources and limits are on the technology and accuracy page.
Plans
Start free. Go Pro when it counts.
Every plan grades every stroke. Pro adds the AI read, boat syncs and reports. Elite is for coaches and power users.
Free
Get started with motion analysis
$0/ month
- 2 video and 5 image analyses a day
- Every stroke graded and explained
- 5 AI coach messages a day
- 30-day history
Mocta-XProMost popular
For serious athletes and coaches
$9.99/ month
- The AI read of every session and crew
- Unlimited boat syncs · 20 analyses a day
- PDF deep reports for you and your coach
- A training plan that adapts every week
Mocta-XElite
For coaches, PTs, and power users
$29.99/ month
- 50 videos a day, unlimited images
- Unlimited AI coach
- Live voice coxswain on the erg
- Custom references + 5 GB storage
Compare every planCoaching a squad? See club plans
FAQ
Questions, answered.
Anything else? Write to support@cam-lab.org and a person answers, usually within a working day.
Grade every stroke.
Free to start. Film your next piece and see the one thing to fix before the next session.