Video in. Motion data out.

MovementModeler transforms any video into clean, accurate stick-figure motion and exportable BODY-25 JSON with embedded metadata — all on-device.

🔒 On-device processing 🧍 Multi-person tracking 🪄 Smoothing & gap filling 🏷️ Activity metadata

See how it works

Stick-figure visualization

Turn raw footage into clear motion clips with sticks, capsules, or sprite rigs that reveal posture, timing, and form.

Export BODY-25 JSON

Send structured pose data with embedded metadata into CV/ML pipelines with zero server setup.

Tag before you export New

Label activity, camera angle, and target subject right in the app. Your data arrives downstream ready to process.

MP4 export

Share clean stick-figure, capsule, or sprite visualizations for reviews, social, or teaching materials.

Multi-rig rendering

Switch between stick figures, capsules, and sprite packs to find the visualization that fits your use case.

On-device & private

No uploads, no accounts, no cloud. All processing stays on your iPhone.

See your motion — clearly.

MovementModeler gives you instant visual feedback with clean, stabilized stick-figure motion. Adjust smoothing, track IDs, and confidence thresholds to reveal posture, timing, and form — all without leaving your iPhone.

Perfect for coaching, choreography, biomechanics analysis, or just exploring how movement works.

Pipeline-ready metadata, built in NEW

Tag your motion captures with structured metadata before you export. No more separate labeling steps — your JSON arrives downstream ready to sort, filter, and process.

Activity label — Pick from a built-in vocabulary: Gait, Sit → Stand, Balance, Dance, Upper Limb, Stairs, and more. Or type a custom label.
Camera angle — Tag as frontal, sagittal, or other so downstream scripts can handle perspective-specific analysis automatically.
Subject selection — In multi-person scenes, mark which tracked person is the primary subject. The index embeds directly in the export.

{
  "fps": 15.0,
  "lmm": {
    "activity": "sit_to_stand",
    "subject_index": 0,
    "camera_angle": "sagittal"
  },
  "frames": [ ... ]
}

Simple pipeline from video to labeled data

For coaches

Make movement measurable. Review form with stick‑figure clips, tag the activity, and share MP4 summaries.

For researchers

Export BODY‑25 JSON with embedded metadata for CV/ML workflows. Keep data local for reproducibility and privacy.

For creators & educators

Turn choreography and demos into clear visualizations for lessons, posts, and feedback.