First time only: scroll down to the “AI written breakdown” card and paste your Anthropic API key in the first box (from console.anthropic.com). It saves on this device.
The routine for almost everything: pick a Mode → Load a video → (optional) type what you want → tap ✨ Auto breakdown → scroll down to the AI card to read it.
I want to…
Do this
Break down my own gym lift (detail + reps + bar)
Solo → Load → Analyze → ✂ Trim to your set → 🎯 tag bar → Generate. (Or just Auto for a quick one.)
Break down someone else's lift / shot / technique
Screen-record the IG/TikTok/YouTube clip → Solo → Load → ✨ Auto breakdown.
BJJ / Muay Thai / football / running / jump
Solo → Load → ✨ Auto breakdown (it detects the type & hands automatically).
Ask a specific thing (not a full breakdown)
Type it in “What do you want from this video?” → Auto. Or use Ask a question after.
Explainer / anatomy / stretching video
Set movement type to “Explainer / tutorial” → Load → Auto → study notes.
Compare me to a reference
Compare 2 videos → A = reference, B = you → Auto.
Spar / two people in one clip
Compare 2 people → Load → pick Person A/B → Generate.
After any run: Ask a question · Drill recommendations · Coaching sheet · Transcribe narration · ★ Save to library · Export report. Track over time in Progress tracking.
Step 1 · Choose mode
Solo analyse one video
Compare 2 videos you vs a reference
Compare 2 people e.g. a spar/roll
Break down a single person's movement in full.
1 · Load video
Video
Video B — you / after
Detects the movement, tracks hands if it's grappling/striking, analyses, and writes the breakdown. Needs your API key (set once in the AI card). Choose Single or Compare in Mode above first.
Type anything you want from the clip, or leave blank and it gives the standard breakdown / explainer.
Load a video…
2 · Choose who to analyse
Multiple people were detected. Pick the subject(s) to track. In a grapple the tracker can swap people during heavy contact — re-pick if a skeleton jumps.
3 · Playback with skeleton overlay
Video A
Video B
0%
✂ Trim to your set full clip
Scrub to your first rep and tap “set START”, scrub to the last rep and tap “set END”. This cuts out walking to/from the camera so reps and angles are accurate.
Coaching summary
Joint angles over time
White line = current frame. Dashed = detected reps. Drag the scrubber above to move.
Frame-by-frame breakdown
Joint
Left °
Right °
Diff
What's different
align by % of movement
Solid blue = A, solid orange = B. Closer curves = more similar.
Metric
A
B
Diff
Progress tracking
Save each analysis to build a history on this device, then watch range of motion, symmetry, reps and tempo trend over time. Filter by movement so you compare like with like.
Date
Label
Athlete
Movement
Outcome
Value
AI written breakdown
Sends sampled frames + the measured angles to Claude, which writes a full breakdown (gym step-by-step + setup, technique intricacies, or spar feedback depending on mode).
Uses your own Anthropic API key — billed separately from your Claude subscription, only a few cents per video. Your key is stored only in this browser; nothing else is.
Get a key at console.anthropic.com.
annotated frames
For videos where someone explains the technique — captures their words (on-device) and folds them into the breakdown so the instructions are exact.
Breakdown library
Saved AI breakdowns on this device. Open one, export it as a shareable report, or delete.
Date
Label
Movement
Export
Exports the raw measured angles. For the written breakdown (instructions, intricacies, spar feedback), use the AI written breakdown card above.