PoseTracker for Personal Trainers: On-Device Squat Form Analysis
A personal trainer coaching through an app cannot see squat depth or knee path. PoseTracker is an on-device pose estimation layer, a Developer Tools tool, that reads phone-camera keypoints and returns reps, angles, and form score. Particularly strong at real-time squat and push-up tracking on mobile — not built for 3D tracking.
- United States 75%
- Mexico 25%
What PoseTracker Does
PoseTracker gives a fitness or rehab app the ability to watch a user’s movement instead of just playing a video at them. It runs MoveNet on-device on iOS, Android, React Native, and web, streaming keypoints without uploading footage. An optional API key unlocks rep counting, joint-angle calculations, jump height, flexibility holds, and a form score. PoseTracker also ships an Assistant that turns a plain-language movement description into a working React Native, Expo, or web snippet on the same engine. Keypoints work free without an API key; reps, angles, and scoring require the paid tier.
Main Features
On-Device Pose Estimation
PoseTracker runs MoveNet directly on the phone, extracting 17 COCO keypoints without sending video to a server. No wearables or external sensors are required. Because detection happens on-device, latency stays low enough for live coaching, and no video leaves the user’s phone, which matters for apps handling bodies in motion rather than static images.
Repetition Counting and Joint-Angle Measurement
PoseTracker counts valid reps for squats and push-ups and calculates angles between tracked joints to measure depth, knee path, and range of motion. This requires an API key beyond the free keypoint stream. The result is a computerized angle reading instead of a guess, though it is not a replacement for a hardware goniometer.
Form Scoring and Pose Comparison
PoseTracker produces a movement-quality form score and compares a live pose against a saved reference position, returning a similarity reading. An app can surface this score directly to a user or trainer. This turns a single rep into a graded event, which a cue list or a recorded video alone cannot do.
Multi-Platform Integration
PoseTracker ships as a React Native and Expo Go package, plus WebView and iframe embeds for web products. Installing @pose-tracker/react-native-pose-estimation and wrapping a screen in PoseTrackerProvider streams keypoints via usePoseTracker without an API key. Reps, angles, and form scoring sit on top of this base install once a key is added.
Use Cases
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Correct squat form
A personal trainer needs to see squat depth and knee path, which a cue list cannot convey. PoseTracker tracks form through the phone camera and returns a score plus joint angles, replacing self-reported reps with real feedback.
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Home workout tracking
A fitness app developer building equipment-free workouts needs the app to see the user, not just the instructor on screen. PoseTracker supplies live keypoints and rep counts via React Native or web, letting sessions react to real movement.
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Virtual physical therapy
A physiotherapist running remote care cannot rely on a weekly video call plus a PDF protocol. PoseTracker analyzes range of motion and compensation via the phone camera for between-session monitoring, though it does not replace a clinician.
Best For / Not For
PoseTracker is built for product teams shipping movement-aware fitness and rehab apps on React Native, iOS, Android, or web, rather than general computer-vision research.
Personal trainers building client-facing form feedback, fitness app developers adding home-workout tracking, and physiotherapists designing remote-monitoring protocols are the named audiences for this stack.
PoseTracker’s free plan caps out at 200 non-commercial API calls monthly and bars commercial use outright, and its 2D, 17-keypoint model skips depth sensing and multi-person tracking, so teams needing medical-grade 3D motion capture, crowded-scene tracking, or free commercial deployment should look elsewhere.
Pricing
PoseTracker’s Freemium plan is free forever for non-commercial use, while commercial projects start at the Developer plan for €50 per month, billed monthly.
| Plan | Price | Included |
|---|---|---|
| FREEMIUM | Free | Limited pose estimation data, up to 200 tracking API calls monthly |
| DEVELOPER | €50 / month, billed monthly | Up to 1000 tracking API calls monthly, access to pose estimation data |
| BUSINESS PLAN | €150 / month, billed monthly | Custom tracking API call limits, custom exercise and tools development |
The Freemium plan carries a visible “Powered by PoseTracker” link and bars commercial use, so any shipped product needs at least the Developer tier.
Pricing checked 2026-10-23.
Quick Comparison
OpenCode is PoseTracker’s main alternative for teams weighing a broader code-editing agent against a narrow movement-tracking SDK. OpenCode connects to more than 75 model providers and edits code directly via Language Server Protocol data. PoseTracker instead ships rep counting, joint angles, and a form score purpose-built for fitness and rehab apps. Choose OpenCode if the project needs general-purpose code generation across a large model fleet. Choose PoseTracker if the product needs a phone camera to watch and score human movement.
Verdict
PoseTracker processes 1,000 tracking API calls monthly on the €50 Developer plan, giving fitness and rehab apps on-device squat and push-up analysis without a hardware goniometer. It fits teams needing movement feedback in React Native or web apps.
