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Tech riderRev. 5 Oct 2026

OpenCap

Ch 196.7of 59 Motion Capture Software
  1. 1Runs oniOS, Web
  2. 2CostsFree plan
  3. 3Body trackingYes
  4. 4Export formatsJSON, TRC, MOT
  5. 5Supported platformsiOS, Web
5 lines stated Written from the maker's own pages: opencap.ai
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The OpenCap homepage

Overview

OpenCap is ranked #19 of 59 in motion capture software on Specifiction. It runs on iOS, Web. There is a free plan.

OpenCap plans and pricing

All plans
OpenCap Free Free for academic or nonprofit non-commercial research or educational use · commercial entities must contact the authors opencap.ai · 5 Oct 2026

Compared on motion capture software

Free plan
Yesopencap.ai
Body tracking
Yesopencap.ai
Export formats
JSON, TRC, MOTopencap.ai
Supported platforms
iOS, Webopencap.ai

Facts

Purpose
OpenCap estimates 3D human movement kinematics and forces from smartphone video for biomechanical analysis.opencap.ai · 5 Oct 2026
Capture modes
It offers multi-camera capture and a beta monocular setup that records with one iPhone.opencap.ai · 5 Oct 2026
Outputs
The platform provides joint angles, moments, and muscle forces through musculoskeletal dynamics.opencap.ai · 5 Oct 2026
Workflow
Users record with iOS devices, review and download data through a web app, and process videos on cloud servers.opencap.ai · 5 Oct 2026
Analysis utilities
OpenCap provides Python utilities for further analysis, including estimating kinetics.opencap.ai · 5 Oct 2026
Use cases
The site lists walking, sit-to-stand, squats, drop jumps, treadmill running, and jumping as example movement analyses.opencap.ai · 5 Oct 2026
Validation
The maker says OpenCap has been validated against marker-based systems.opencap.ai · 5 Oct 2026
Security
The maker says data is encrypted in transit and at rest and that its infrastructure is HIPAA-compatible.opencap.ai · 5 Oct 2026
Data access
OpenCap's terms say the development team can view submitted data, including videos, and may use it for algorithm development.opencap.ai · 5 Oct 2026
Data sharing
Investigators must obtain participant consent, and participants can choose among several levels of public data sharing, including no public sharing.opencap.ai · 5 Oct 2026
Commercial use
The service terms prohibit use by commercial entities, including for research, and direct interested entities to contact the authors.opencap.ai · 5 Oct 2026
Device requirements
The multi-camera instructions require at least two iOS devices and say iPhones, iPads, and iPods released in 2018 or later are supported.opencap.ai · 5 Oct 2026
Monocular requirements
The monocular instructions require one iPhone for recording and say no calibration step is needed.opencap.ai · 5 Oct 2026
Support
The contact page directs technical questions to the multi-camera or monocular forums before emailing and says Android is not supported.opencap.ai · 5 Oct 2026

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Where it ranks on Specifiction

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Sources