FC FormCoach AI

United Hacks V7 Β· Sports Track

Every athlete deserves a coach.
Now everyone has one.

FormCoach AI watches your training through your webcam and coaches you live β€” and it does something no fitness app does: the Movement Twin learns your best rep and coaches you against yourself, with measured corrections like β€œdepth 12Β° short of your best.” Voice in, voice out β€” designed for complete eyes-free operation. No video ever leaves your device.

What it does

One coach, every layer of training β€” live in your browser.

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Movement Twin

Your best rep becomes your baseline: a ghost skeleton to race, and measured deviations β€” β€œtorso leaned 13Β° more than your best” β€” whenever you fall short of yourself.

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Voice in, voice out

Spoken coaching cues, hands-free commands, and real conversation: ask β€œwhat should I fix first?” mid-set and hear the answer. Designed for eyes-free training.

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Fatigue detection

When form degrades rep after rep, the coach names the exact rep the decline began β€” and tells you to rest before bad reps pile up.

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5 drills, every rep measured

Strength (squat, push-up, curl, shoulder press with lockout & back-arch safety check) and conditioning (jumping jacks with a full-extension check) β€” each drill has its own joint-angle state machine.

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Coach any footage

Upload a video, or screen-capture a playing YouTube clip β€” the same engine overlays the skeleton and coaches the athlete live.

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4 AI agents + local LLM

Biomechanics, injury-risk, programming and progress agents write an explainable readiness report β€” generated by Claude or a fully local LLM via Ollama.

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Zero-knowledge accounts

Email + password sign-in where the password never leaves the device and your history is AES-256 encrypted. No server, no database, nothing to breach.

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Team dashboard

Athletes train privately in their own browsers; the coach sees sessions, trends and risk flags for the whole squad behind an access key.

How it works

1

Pose estimation

Google MediaPipe (full model) tracks 33 body landmarks at ~30fps, entirely on your device via WebAssembly + GPU.

2

Biomechanics engine

Joint angles run through per-exercise state machines with EMA smoothing, anti-blip guards and visibility gating.

3

Form scoring

Each rep starts at 100 and loses points for depth, alignment and stability faults β€” flagging common form-risk patterns. A coaching aid, not a medical diagnostic tool.

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The Twin

Your best rep’s metrics become your private baseline; every rep is measured against it, and deviations are spoken in degrees.

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Privacy by architecture

Your camera feed physically cannot leave the browser β€” a live counter proves it, and DevTools verifies it. Local-only mode sends nothing at all.

Launch FormCoach β†’

DON'T GUESS.
MEASURE.

Every rep, scored. Every fault, in degrees. Every athlete, against their own best.

Start training β†’