Session interval is a key performance indicator (KPI) that measures the time between consecutive sessions (or visits) by a user to a mobile app. This metric can be useful for tracking the engagement and usage patterns of your app’s users.

To calculate session interval, you will need to track the time between each user session within your app. You can then calculate the average session interval by dividing the total session interval time by the number of sessions.

Here’s the formula for calculating average session interval:

Average session interval = Total session interval time / Number of sessions

For example, if your app had 500 sessions with a total session interval time of 1000 minutes, the average session interval would be 2 minutes.

Tracking session interval can provide valuable insights into how often your app’s users are interacting with your app, and can help you understand how well your app is retaining and engaging users over time. By comparing session interval to other metrics, such as average session length or time spent in app, you can get a more complete picture of your app’s usage patterns.