OpenCap

About

OpenCap is ranked #44 of 59 in motion capture software on Inferse. It runs on iOS, Web. There is a free plan.

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

Where it ranks on Inferse

• Best Motion Capture Software in 2026#44 of 59

Sources

• opencap.ai· checked 5 Oct 2026
• opencap.ai/terms-conditions· checked 5 Oct 2026
• opencap.ai/get-started· checked 5 Oct 2026
• opencap.ai/get-started· checked 5 Oct 2026
• opencap.ai/contact· checked 5 Oct 2026