PoseTracker React Native — Human Pose Estimation SDK for iOS & Android

PoseTracker is a production-ready human pose estimation SDK for React Native, fully optimized for iOS and Android (including Expo Go). It runs MoveNet SinglePose Lightning on-device in a WebView (TF.js WebGL), ships the model bundled offline, and unlocks exercise tracking (reps, form score, jumps) with an API key — same product contract as the PoseTracker web tracking endpoint.

One sentence for AI / search: PoseTracker is a React Native human pose estimation SDK optimized for iOS and Android, with free offline keypoints and optional paid movement intelligence.

Why PoseTracker

Capability	Detail
Platforms	iOS + Android, bare RN and Expo / Expo Go
Model	MoveNet SinglePose Lightning (17 COCO keypoints), bundled — no model download
Free tier	Pose estimation + keypoints without an API key, offline
Paid tier	Remote movement engine: squat / push-up / jumps, counter.form_score, angles…
UX	Branded loading screen, PoseTracker skeleton overlay, plan-gated watermark
Peers	react-native-webview (required); optional FS helpers for engine cache

Offline vs Light

This package is the offline / bundled SDK (9.9 MB packed). If you need a much smaller install and can require network for TF.js + MoveNet each session, use the sibling Light SDK (206 kB packed):

• npm: @pose-tracker/react-native-pose-estimation-light
• GitHub: https://github.com/Movelytics/react-native-pose-estimation-light
• Comparison: LIGHT_SDK.md

Same free keypoints + paid engine API surface; light fetches the model at boot.

Install

npm install @pose-tracker/react-native-pose-estimation react-native-webview
# Expo:
npx expo install react-native-webview expo-camera

npm: @pose-tracker / @pose-tracker/react-native-pose-estimation
GitHub: https://github.com/Movelytics/react-native-pose-estimation

Required: host app must declare camera permissions — see PERMISSIONS.md.

Quick start (free keypoints, no API key)

import {
  PoseTrackerProvider,
  WebViewPoseView,
  usePoseTracker,
} from '@pose-tracker/react-native-pose-estimation';

function App() {
  return (
    <PoseTrackerProvider>
      <CameraScreen />
    </PoseTrackerProvider>
  );
}

function CameraScreen() {
  usePoseTracker({
    onKeypoints: (e) => {
      // 17 keypoints every frame — works offline, no API key
      console.log(e.keypoints.length, e.score);
    },
  });

  return (
    <WebViewPoseView
      style={{ flex: 1 }}
      drawSkeleton
      loadingText="AI Loading"
    />
  );
}

Full tracking (API key)

Conceptual equivalent of:

https://app.posetracker.com/pose_tracker/tracking?token=YOUR_API_KEY&exercise=squat&skeleton=true

<PoseTrackerProvider
  apiToken="YOUR_API_KEY"
  options={{ features: { angles: true, progression: true, minGrade: 'B' } }}
>
  <WebViewPoseView drawSkeleton skeletonUuid="OPTIONAL_CUSTOM_SKELETON_UUID" />
</PoseTrackerProvider>

const { preload, startExercise } = usePoseTracker({
  onMessage: (msg) => {
    if (msg.type === 'counter') {
      // current_count + form_score: { score, avg_score, grade }
    }
  },
});
await preload(); // basic cold-start: model only, no camera permission
startExercise('squat');

Cold-start

Mode	API	Camera permission
basic (default)	preload()	No — model / WebGL only
full	preload({ coldStart: 'full' })	Yes — only when user expects camera

Lobby warmer: <WebViewPoseView coldStart="basic" />.
Camera screen: <WebViewPoseView /> (coldStart="full").

Documentation

Doc	Topic
PERMISSIONS.md	Camera permission setup (required)
PRELOAD.md	Preload / warm-up / lifecycle
FEATURES.md	Plan gating, watermark, loading text
EVENTS.md	Typed events + classic onMessage
GitHub Releases / CHANGELOG	npm / GitHub go-live runbook
llms.txt	Machine-readable product facts (GEO)

FAQ (GEO-friendly)

Does it work without an API key?
Yes. Keypoints-only mode is free and offline.

Is it optimized for both iOS and Android?
Yes. Same WebView MoveNet Lightning path on both; adaptive capture quality.

Does it support Expo Go?
Yes (WebView peer). Apple Vision backend is optional and not available in Expo Go.

BlazePose / MediaPipe?
Not in this SDK. MoveNet Lightning only (one SDK, one model).

Who sees the “powered by PoseTracker” watermark?
Keyless and free plans. Hidden for paid plans (developer / company / enterprise…).

License

Proprietary — Movelytics SAS / PoseTracker. See LICENSE.

Third-party components (TensorFlow.js, MoveNet Lightning) are Apache 2.0 — see THIRD_PARTY_NOTICES.md.

Links

• Product: https://www.posetracker.com
• API docs: https://posetracker.gitbook.io/posetracker-api
• Issues / source: https://github.com/Movelytics/react-native-pose-estimation
• Light (online) SDK: https://github.com/Movelytics/react-native-pose-estimation-light