MoctaX - Sports Biomechanics
Grade every stroke you row
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Film a piece on the erg or on water and get the whole boat graded stroke by stroke. Catch and finish angles, rate, consistency — plus an AI coach that reads your session.
Film a piece. Get it graded, stroke by stroke.
MotionX turns the phone already in your kit bag into a technique lab. Point it
at the erg, the boat or the road and it reads your body position frame by
frame — no sensors, no markers, no special camera.
You get back a score, and more usefully, the reason for the score: which part
of the stroke cost you the points, and what to change.
BUILT FOR ROWING
• Catch and finish angles, measured rather than eyeballed
• Stroke rate and rate spread — is the rhythm metronomic, or wandering?
• Consistency, Efficiency and Durability scored as separate pillars
• Your best and median stroke, and whether technique held to the end
• A capture wizard and trimmer, so a usable clip takes one attempt
CONCEPT2 PM5 OVER BLUETOOTH
Pair the monitor and record erg pieces live. Splits, rate, distance and heart
rate are logged next to the video, and you can connect your Concept2 account so
the workouts already in your logbook come across too.
AN AI COACH THAT HAS READ YOUR SESSION
Ask about any piece and the answer comes from your own numbers, not from
generic advice — and it points at the strokes it is talking about. On the erg
it can talk to you while you row.
FOR CLUBS AND CREWS
Join your squad with an invite code. Coaches review sessions, leave comments in
their own voice, publish a report, and run a shared film room the whole squad
can watch. Athletes get a notification the moment feedback lands.
ALSO WORKS FOR
Golf, running and volleyball. Swing and gait analysis, joint angles through the
movement, and side-by-side comparison against a reference clip.
FOUR WAYS TO ANALYSE
• Rowing — a single clip, graded
• Image vs image — two static positions compared
• Video vs video — two sequences aligned and scored
• Realtime — live skeleton and scoring straight from the camera
BUILT TO BE TRUSTED
Every number is traceable to the frame it came from. When a clip is too dark,
too far away or too short to grade honestly, the app says so instead of
inventing a result.
Your history stays yours: past pieces, PDF reports, a training log and a
streak, all in one place.
English and 简体中文, switchable in Settings without restarting.
—
SUBSCRIPTIONS
MotionX is free to use, with daily limits on analyses and AI coaching.
MotionX Pro — $9.99/month or $79.99/year
Higher daily limits, the streaming AI coach, PDF reports, advanced DTW
comparison, 500 MB of storage and unlimited history.
MotionX Elite — $29.99/month or $239.99/year
Unlimited image and realtime analysis, the live voice coach, 5 GB of storage,
custom reference uploads, the reference library and priority support.
Both tiers include a 7-day free trial. Payment is charged to your Apple Account
at confirmation of purchase. A subscription renews automatically unless it is
turned off at least 24 hours before the end of the current period, and your
account is charged for renewal within 24 hours of the end of that period. You
can manage and cancel your subscriptions in your Apple Account settings after
purchase. Any unused portion of a free trial is forfeited when a subscription
is purchased.
Terms of Use: https://motion.cam-lab.org/terms
Privacy Policy: https://motion.cam-lab.org/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
What's New in 1.4.3
A big one. Race your crew live from anywhere, start a training plan in one tap, and see every stroke the moment you stop.
Row together, live
Open a room, share the code, and race friends or your whole crew on your own PM5s, wherever each of you is. Start together on a countdown or go when you're ready, follow everyone's split live, and watch the boats move down one course. Club rooms are open to your whole team. Free for everyone.
Plans, ready in a tap
Train now has three clear views: Week, Plans and Erg. Start a ready-made plan (2k prep, Aerobic base, Head race prep, Race-week taper and more), or let the AI coach build one around your goals. Keep using the app while it's built; we'll tell you when it's ready.
A stricter, sharper stroke score
We rebuilt the erg stroke score on real PM5 force curves. Every stroke is graded on catch, peak, fullness, finish and smoothness, and the one fix that matters most comes first, with a cue and a drill. It's stricter than before, so expect lower numbers that mean more.
Every stroke, the moment you stop
Your full analysis opens as soon as the piece ends: scrub stroke by stroke through pace, rate and force curve in sync. Just a warm-up? Discard it without saving. Mid-piece, turn your phone sideways for a full-width curve and bigger numbers.
Share with your coach
Send any session privately by link, AirDrop or QR code. Make it view-only or let them save it, set an expiry, and switch it off anytime. Sessions shared with you land in "Shared with me".
Run your club from your phone
Coaches can build and assign training plans, set lineups, check the squad's erg board and get an AI read of the week, all on iPhone. Boat sync now asks you to tap your crew first, so no seat goes to a rower from another boat.
Polish & fixes
• See whether your analysis is queued or processing; we'll notify you when it's done
• Exported videos open straight in the share sheet
• Erg pieces that fail to sync stay on your phone, with Retry and Export
• Thumbnails show a real frame from your session
• A cleaner, darker look for sheets and menus
• Fixed Training plans in Settings showing an error
• Fixed a crash when opening the app from a notification
The developer, 涤非 汪, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Health & Fitness
- Contact Info
- User Content
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Financial Info
- User Content
- Usage Data
- Diagnostics
- Body
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 涤非 汪
- Size
- 47.2 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 18.5 or later.
- iPhone
Requires iOS 18.5 or later. - Mac
Requires macOS 15.5 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.5 or later.
- iPhone
- Languages
- English and Simplified Chinese
- Age Rating
13+
- 13+
- Infrequent
Medical Treatment information
Contests
Contains
Messaging and Chat
User-Generated Content
Health or Wellness Topics
- In-App Purchases
Yes
- MotionX Pro $9.99
- MotionX Pro $79.99
- MotionX Elite $239.99
- MotionX Elite $29.99
- Copyright
- © Michael Hu
