Automatically collected events

ad_click

ad_event_id

ad_exposure

at least one ad served by the Mobile Ads SDK is on screen

firebase_screen, firebase_screen_id, firebase_screen_class, exposure_time

ad_impression

ad_event_id

ad_query

an ad request is made by the Mobile Ads SDK

ad_event_id

ad_reward

a reward is granted by a rewarded ad served by the Mobile Ads SDK

ad_unit_id, reward_type, reward_value

adunit_exposure

an ad unit served by the Mobile Ads SDK is on screen

firebase_screen, firebase_screen_id, firebase_screen_class, exposure_time

app_clear_data

the user resets/clears the app data, removing all settings and sign-in data

app_exception

the app crashes or throws an exception

fatal, timestamp

app_remove

an application package is removed or "uninstalled" from an Android device

Note: Android only

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.

app_update

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.

previous_app_version

first_open

a user launches an app the first time after installing or re-installing it

This event is not triggered when a user downloads the app onto a device, but instead when a user first uses it.

To review raw download numbers, check in Google Play Developer Console or in iTunesConnect.

previous_gmp_app_id, updated_with_analytics, previous_first_open_count, system_app, system_app_update, deferred_analytics_collection, reset_analytics_cause

in_app_purchase

a user completes an in-app purchase, including an initial subscription, that is processed by the App Store on iTunes or by Google Play

The product ID, product name, currency, and quantity are passed as parameters.

For Android in_app_purchase events, link your app to Firebase and connect your app to Play . 

Note: Paid-app purchase revenue and refunds (iOS only) are not automatically tracked.

product_id, price, value, currency, quantity, subscription, free_trial, introductory_price

os_update

the device operating system is updated to a new version.

The previous operating system version id is passed as a parameter.

previous_os_version

screen_view

a screen transition occurs and any of the following criteria are met:

• The new screen-class name differs from the previous screen-class name
• The new screen id differs from the previous screen id

firebase_screen, firebase_screen_class, firebase_screen_id, firebase_previous_screen, firebase_previous_class, firebase_previous_id

session_start

a user engages the app for more than the minimum session duration after a period of inactivity that exceeds the session timeout duration .

user_engagement

periodically, while the app is in the foreground.

engagement_time_msec