> For the complete documentation index, see [llms.txt](https://docs.tryterra.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tryterra.co/faq/help-topics/data-api-sdk/data-model-fields-and-units/three-sleep-scores-explained.md).

# What's the difference between the three sleep scores?

There are three sleep scores:

* **`scores.sleep` in the daily payload**, the wearable's overall daily sleep assessment (may account for naps depending on the device).
* **`scores.sleep` in the sleep payload**, the wearable's quality score for that specific sleep session.
* **`data_enrichment.sleep_score` in the sleep payload**, Terra's own standardised score, computed per session when [Health Scores](https://docs.tryterra.co/user-engagement/health-scores) are enabled on the dashboard.

Nap handling for device scores depends on each wearable's algorithm.