> For the complete documentation index, see [llms.txt](https://posetracker.gitbook.io/posetracker-api/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://posetracker.gitbook.io/posetracker-api/use-posetracker-on-real-time-camera-webcam/tracking-endpoint-message-to-handle/developer-plan-exercise-progression.md).

# \[developer plan] Exercise Progression

<mark style="color:red;">This feature need an API\_KEY from a developer plan (50€ / monthly)</mark>

After matching placement requirements you can start counting repetitions

PoseTracker accurately analyzes the user's motion and posture, estimating a percentage of progression for each exercise. PoseTracker will post message with this data composition :

```json
{
  "type": "progression",
  "value": 10
}
```

Possible values :

```
{
  type: 'progression',
  value: 0...100 (a percentage)
}
```