# Why doesn't my daily active user count match Firebase?

Although [<mark style="color:blue;">Firebase documentation</mark>](https://support.google.com/firebase/answer/6317517#active-users\&zippy=%2Cin-this-article) claims they calculate daily active users by unique users who've fired a `user_engagment` event, some app developers see drift from the Firebase dashboard and unique `user_engagement`events in BigQuery. For this reason we support expanding the criteria for "active user" counts as [<mark style="color:blue;">explained in this article.</mark>](https://docs.adlibertas.com/the-platform/user-level-audience-reporting/advanced-reporting-methods/user-measurement-and-calculation-details#measuring-active-users)


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