> ## Documentation Index
> Fetch the complete documentation index at: https://docs.posetracker.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Choose a package

> Offline vs Light — same API, different delivery of MoveNet and TF.js.

Two npm packages share the same product contract. They differ only in **how MoveNet / TF.js are delivered**.

## Recommendation

| Need                                                | Package     |
| --------------------------------------------------- | ----------- |
| Offline-first keypoints · no model download at boot | **Offline** |
| Smallest install / OTA · devices are online         | **Light**   |

## Comparison

|                           | **Offline**                                                                                                              | **Light**                                                                                                                            |
| ------------------------- | ------------------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------ |
| **npm**                   | [`@pose-tracker/react-native-pose-estimation`](https://www.npmjs.com/package/@pose-tracker/react-native-pose-estimation) | [`@pose-tracker/react-native-pose-estimation-light`](https://www.npmjs.com/package/@pose-tracker/react-native-pose-estimation-light) |
| **Packed tarball**        | \~**9.9 MB**                                                                                                             | \~**206 kB** (\~48× smaller)                                                                                                         |
| **Unpacked**              | \~14.7 MB                                                                                                                | \~779 kB                                                                                                                             |
| **MoveNet / TF.js**       | Bundled in npm                                                                                                           | CDN + model URL each WebView boot                                                                                                    |
| **Network for keypoints** | Not required                                                                                                             | **Required**                                                                                                                         |
| **Expo Go**               | Yes                                                                                                                      | Yes                                                                                                                                  |
| **API surface**           | Keypoints free; paid engine with API key                                                                                 | Same                                                                                                                                 |

## Install

```bash theme={null}
# Offline
npm install @pose-tracker/react-native-pose-estimation react-native-webview

# Light
npm install @pose-tracker/react-native-pose-estimation-light react-native-webview
```

## Light model URL

Default MoveNet Lightning graph (weights are relative neighbors):

```
https://app.posetracker.com/scripts/tmp_model_to_remove.json
```

Optional overrides on the provider:

```tsx theme={null}
<PoseTrackerProvider
  options={{
    model: 'movenet', // default
    // modelUrl: 'https://…/model.json',
  }}
>
```

`model: 'blazepose'` is accepted for API parity but **not wired** yet.

## Demos & source

|      | Offline                                                                 | Light                                                                         |
| ---- | ----------------------------------------------------------------------- | ----------------------------------------------------------------------------- |
| SDK  | [GitHub](https://github.com/Movelytics/react-native-pose-estimation)    | [GitHub](https://github.com/Movelytics/react-native-pose-estimation-light)    |
| Demo | [Demo](https://github.com/Movelytics/react-native-pose-estimation-demo) | [Demo](https://github.com/Movelytics/react-native-pose-estimation-light-demo) |

## Next

Continue with [Quickstart](/quickstart), [Permissions](/permissions), or [Provider options](/reference/provider-client) (including light-only `model` / `modelUrl`).