Location: App Analysis > App Engagement > Overview
Description: The Usage Time/Session metric refers to the average session time for the app, in HH:MM:SS.
A session ends when an app is closed or has been moved to the background for more than 30 seconds.
The next time the app is opened, a new session begins. If the app does not close or move to the background for over 30 seconds, the same session continues.
For more on session duration for app users, check out our blog post, Session Duration: How to Measure It and What It Reveals.