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Automatically collected events

Firebase collects these events by default.

 

Automatically collected events are triggered by basic interactions with your app. As long as you use the Firebase SDK, you don't need to write any additional code to collect these events. To see event reports, click Events in the report navigation in Google Analytics, or click the Events tab in the Firebase console.

Event name Triggered...
first_open the first time a user launches an app after installing or re-installing it.

This event is not triggered when a user downloads the app onto a device, but instead when he or she first uses it. To see raw download numbers, look in Google Play Developer Console or in iTunesConnect.
in_app_purchase when a user completes an in-app purchase that is processed by the App Store on iTunes or Google Play. The product ID, product name, currency, and quantity are passed as parameters.

This event is triggered only by versions of your app that include the Firebase SDK. Note: paid app-purchase revenue, subscription revenue (Android only), and refunds are not automatically tracked. Your reported revenue may differ from the values you see in the Google Play Developer Console. Events which are flagged as being invalid or sandbox (test) are ignored.
user_engagement periodically, while the app is in the foreground.
session_start when a user engages the app for more than the minimum session duration after a period of inactivity that exceeds the session timeout duration.
app_update

when the app is updated to a new version and launched again. The previous app version id is passed as a parameter.

This event is conceptually different from the Daily upgrades by device metric, which is reported by Google Play Developer Console.  An upgrade refers to the updating of the application binary, whereas an app_update event is triggered upon the subsequent launch of the upgraded app.

app_remove when an application package is removed or "uninstalled" from an Android device.

This event is different from the Daily uninstalls by device and Daily uninstalls by user metrics, which are both reported by Google Play Developer Console. The app_remove event counts the removal of application packages, regardless of the installation source, and the count changes depending on the date range you are using for the report. The Daily uninstalls by device and Daily uninstalls by user metrics count the removal of application packages only when they were installed from Google Play, and are reported on a daily basis.
os_update when the device operating system is updated to a new version. The previous operating system version id is passed as a parameter.
app_clear_data when the user resets/clears the app data, removing all settings and sign-in data.
app_exception when the app crashes or throws an exception.
notification_foreground when a notification sent by Firebase Notifications is received while the app is in the foreground.
notification_receive when a notification sent by Firebase Notifications is received by a device when the app is in the background. Android apps only.
notification_open when a user opens a notification sent by Firebase Notifications.
notification_dismiss when a user dismisses a notification sent by Firebase Notifications. Android apps only.
dynamic_link_first_open when a user opens the app for the first time via a dynamic link.
dynamic_link_app_open when a user re-opens the app via a dynamic link.
dynamic_link_app_update when the app is updated to a new version and is opened via a dynamic link. Android apps only.
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