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 the actual set:full clipScrub to the first rep → set start; scrub to the last → set end. Excludes walking to/from the camera.
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.
For videos where someone explains the technique — captures their words (on-device) and folds them into the breakdown so the instructions are exact.
Export
Exports the raw measured angles. For the written breakdown (instructions, intricacies, spar feedback), use the AI written breakdown card above.