Adding user time to your reports
Firebase has a helpful feature where every event they fire, they’ll include a parameter in the event that will tell you how much time has elapsed since the last event. This parameter is called engagement_time_msec. When these parameters are added up, this can tell you the total time a user spends in the app. (Details on this event are available in this article)
I walk through this in a video and with a couple of screenshots.
When creating a report, under Custom Metrics, you can add “User’s Engagement Time in App” that will add up all the “elapsed time” that’s recorded in engagement_time_msec.
Then when viewing the report, you’ll see a sum & count feature added. For the total time, you’ll want to view the sum! (The count is actually the number of events, not helpful in this context!)
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