Coming soon · Founding cohort in beta now

Stop pausing the video to draw the lines yourself.

Every coach, PE teacher and athlete analysing movement does the same manual work: scrub frame by frame, draw the angles on the screen, explain it, start again on the next rep.

MotionGrade does it to every rep automatically — joint angles, balance, left/right match — then grades whether the technique held across the whole session, and teaches the biomechanics underneath it.

Tempo 92 Rhythm 88 Balance 81 L/R match 0.94 Session consistency A−

A− session held

The problem

The work is already being done. By hand.

This isn't a habit anyone needs persuading into. Look at how movement gets analysed today and you're watching people do a job a machine should have taken off them years ago.

What happens now

Film the movement. Scrub back. Pause on the moment you think matters. Draw a line down the spine with your finger. Screenshot it. Try to explain what you're seeing. Realise the next rep was different. Start again.

Twenty minutes to produce one annotated still — of one rep, chosen by whoever was holding the phone.

What MotionGrade does

Upload the clip. Every frame gets the skeleton, the joint angles, the plumb line and the ground contact. Every rep gets nine measures. The set gets a grade for whether it held together — and a breakdown of the biomechanics at quarter speed.

One upload. Every rep. Nothing drawn by hand.

Who's doing it by hand right now

Same manual job. Four different reasons it hurts.

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Coaches & trainers

You can see the fault in three seconds. Proving it to the athlete is the twenty-minute job — pausing, drawing, "look, here, see how it opens early?" — and they nod without seeing it. Your eye was never the bottleneck. The evidence was. MotionGrade builds the exhibit for you, on every rep, so the conversation starts where it used to end.
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PE teachers & biomechanics lecturers

Joint angles and the kinetic chain taught off a textbook diagram of a body that isn't theirs. You hand-annotate video for every session and it's still static and still generic. Point this at a student's own movement and the diagram becomes theirs, with the numbers live on it.
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Athletes training alone

What you feel and what you do are different things, and nothing in the room tells you which. You film yourself, watch it back, and can't tell — because you don't know what to look at. And nobody ever watches rep eight. This does, and tells you where it went.
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Creators

Movement content is hard to make teachable. "Here's my swing" isn't a video. "Here's my swing, and here's the read showing it fell apart on rep four" is. The analysis is the post — so using the tool and making the content stop being two jobs.

What it looks like

The read, on real clips.

Joint angles, plumb line, ground contact and the running score — tracked frame by frame, not stamped onto one still you picked by hand.

A sprint and a pitch, read side-on. Both legs stay separately visible through the movement, so balance and left/right match hold up the whole way through. The vertical clip above is the same thing on a boxer and a golf swing.

Before / after

Where you stand decides what we can read.

Two of our own clips. Both tracked cleanly — the skeleton is locked on in both. The only thing that changed is where the phone was.

A golf swing filmed down the line. The two feet almost completely overlap and head stack reads 8 per cent. — ✗ Filmed down the line Head stack 8%
Look at the feet — almost on top of each other. No measurable base, so the measure built on it collapses.

A boxer filmed side-on. Both feet are clearly planted and separated, and head stack reads 79 per cent. — ✓ Filmed side-on Head stack **79%**
Both feet planted and clearly apart. Same tool, same overlay — now there's a base to measure against.

So here's the fix

It's one step sideways.

Not a lens, not a rig, not a second person. Move the phone a quarter-turn around whoever's moving, so it can see the gap between their feet.

A plan view from overhead. An athlete stands at the centre with their feet apart on a diagonal stance line. A ring around them is green in the two zones at right angles to that stance line, where a camera can see the gap between the feet, and amber in the two zones aligned with it, where one foot hides the other. — Green is every camera position where the read works — a quarter-turn off the line your feet point in.

Seven more like this, and what each one buys you: the filming guide →

How it works

Film it. Grade it. Understand it.

Film your movement

A run, a lift, a swing, a flow — one clip on your phone, several reps in one take. No sensors, no markers, no lab.

Get the grade

Nine measures on every rep, scored against each other — so you see whether the technique held across the set, not just whether one rep looked good.

Learn the why

A coach breakdown plus the physics and biomechanics of the movement at 0.25× — so you build a real relationship with what the body is doing.

Step 01 is the one people skip. The angle you film from decides how much can be read at all — so we wrote it down: how to film for a full read →

Why this and not the annotation apps

Three differences that actually matter.

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The whole session, not one rep

Drawing on a still can only ever describe the moment you chose. Consistency across a set is the thing that separates trained movement from lucky movement — and it's invisible unless something reads every rep.

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It explains, it doesn't just measure

A number tells you that something is off. The biomechanics breakdown tells you why it happens and what changes it. Coaches don't need a scoreboard; they need the argument.

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It tells you what it can't read

Film from a bad angle and most tools hand back a confident number anyway. This one says so up front — "this angle gives you 6 of 9" — while you can still re-film. You can't coach off a score you don't trust.

Two ways in — both free right now