> For the complete documentation index, see [llms.txt](https://help.twinr.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.twinr.dev/app-analytics/acquisition-and-retention/average-session-length.md).

# Average Session Length

Track the average amount of time users spend in a single session. This metric gives you a high-level overview of user engagement.

<figure><img src="/files/TOUsLYFvBGJbdUWqSjUr" alt=""><figcaption></figcaption></figure>

Here in the image, we can see:

* Average session length by Android and iOS for current period(5 Dec to 3 Jan). The selected timeframe here is 30 days.
* 19% shows the comparison of previous period from current one.
* 1 min 9s is average time for the sessions generated by iOS devices and 1 min 13s sessions generated for Android in last 30 days so there is no data.