Prepare for Apple's App Store data disclosure requirements

Apple requires developers publishing apps on the App Store to disclose certain information regarding their apps’ data use. Apple has announced that these disclosures are required for new apps and app updates starting December 8, 2020.

This document contains Firebase Apple platform library behaviors that could require disclosure according to Apple's guidelines. When installing Firebase, take note of the build targets installed into your app by your dependency manager of choice. For each target that your dependency manager lists, review the corresponding section of this document to determine what data collection you must disclose. The number of Firebase build targets you have installed may be greater than the number you expected since some Firebase build targets have transient dependencies on others.

If you are using any optional product features that involve additional data or participating in any tests of new product features that involve additional data, be sure to check if those features or tests require additional data disclosures.

To ensure your app's disclosures are accurate, we recommend that you always use the latest version of each Firebase SDK.

Firebase user agent

The Firebase user agent is a bundle of information collected from most Firebase SDKs and includes the following: device, OS, app bundle ID, and developer platform. The user agent is never linked to a user or device identifier and is used by the Firebase team to determine platform and version adoption in order to better inform Firebase feature decisions.



  • Does not collect data.


  • Does not collect data, but includes networking utilities which may be used by other SDKs to collect data.


Includes networking utilities which may be used by other SDKs to collect data.

Always collected

  • Collects metadata about SDK performance, such as the size of the client log event cache and the number of client log events dropped for various reasons, to monitor and maintain product quality.

A/B Testing


A/B Testing does not collect data.

The Firebase A/B Testing SDK sets and uses Google Analytics user properties in order to specify membership in experiment groups for Firebase Remote Config and Firebase In-App Messaging.

Google Analytics

Google Analytics data collection information can be found in this support article.

App Check



App Distribution

The App Distribution SDK is intended for beta testing usage only. Do not include the App Distribution SDK in your application when submitting to the App Store.



Always collected

  • Generates and stores identifiers for user authentication purposes.


  • Collects a display name, if the developer provides a display name for the user.
  • Collects users' email addresses as provided by the developer when using email password or email link authentication, or as contained in the response from a federated provider if the developer uses a federated identity.
  • Collects users' phone numbers as provided by the developer when using phone auth or if the user's phone number is added as an authentication method. Also collected during SMS-as-second-factor authentication flows.
  • Collects contact information related to third-party authentication providers if the developer uses a third-party authentication provider with Firebase Authentication. For example, a user's identifier may be linked to their Facebook profile if the developer uses Facebook authentication, depending on the scopes granted. Refer to the authentication provider's documentation for more information.
  • Stores the user's Game Center ID if the app is linked to the Game Center.
  • Collects this token if your app uses reCAPTCHA Enterprise to protect Authentication flows. See additional Apple privacy details for reCAPTCHA Enterprise.
  • If data collection is enabled, collects the Firebase user agent.



Always collected

  • Collects stack traces and relevant application state when an application crashes.
  • Collects device and OS information to assist with debugging crashes.


  • Collects any custom keys, logs, and free-text user IDs that developers attach to crash reports. Also collects any developer-defined non-fatal events with custom stack traces.
  • Collects "breadcrumb" logs if Crashlytics is used together with Google Analytics. These logs identify user actions immediately before a crash along with crash counts.

Realtime Database


Always collected

Always collected

  • Temporarily collects device data, including the device's screen dimensions, language, OS version, bundle ID, IP address, and Firebase SDK version for deferred-deep links (deep-link post app install).

Collected by default

  • Automatically logs link interaction events via Google Analytics if the FirebaseAnalytics framework is present. To disable automatic event logging, remove FirebaseAnalytics from the app.
  • Temporarily collects the dynamic link URL in the device pasteboard, if available, on first app launch. Developers can disable the use of Pasteboard by setting the FirebaseDeepLinkPasteboardRetrievalEnabled property to NO in the app's Info.plist file.

Cloud Firestore


Always collected

Cloud Functions


Always collected

  • Collects function invocation metadata, including the function name and IP address of the function caller.

In-App Messaging


Always collected

  • Records interactions with in-app messages. These interactions (impressions, clicks, dismissals) are recorded via Google Analytics. Interactions are also recorded by Firebase to help developers evaluate the effectiveness of messaging campaigns.

Firebase installations


Always collected

FirebaseInstanceID (deprecated)

FirebaseInstanceID is deprecated.

Always collected

  • Generates per-installation identifiers that do not uniquely identify a user or physical device.
  • Generates and collects the FCM registration token, an app instance ID used by FirebaseMessaging for push notifications.
  • Records the APNs token and associates it with a Firebase instance ID (FCM registration token).
  • Collects device model, language, time zone, OS version, application identifier and application version to generate the FCM registration token.

Cloud Messaging


Always collected

  • Collects application identifier and application version for topic subscription and unsubscription.

Collected by default

  • Automatically logs notification interactions via Google Analytics if the FirebaseAnalytics framework is present. To disable this behavior, remove FirebaseAnalytics from your app.

Usage dependent

Firebase ML


  • Does not collect any data.


Always collected

  • Collects ML model download metadata, such as download events, deletion events, and errors.


Collected by default

  • Collects ML inference metadata, such as inference duration and error rate. To disable, set the ModelInterpreter.isStatsCollectionEnabled property to false.


Collected by default

  • Collects ML Vision model metadata, such as creation and detection events. To disable, set the Vision.isStatsCollectionEnabled property to false.

Performance Monitoring


Always collected

  • Collects IP addresses to provide geography-based segmentation of performance data.
  • Collects app performance metrics such as app launch time and network request latency, as well as developer-specified custom traces to measure app performance.
  • Collects CPU/memory usage of the application to provide a timeline view of the app’s performance.
  • Collects device information, OS information, application information to filter the performance data against different segments of devices.

Remote Config


Always collected

  • Collects the Firebase user agent.
  • Collects the device's country code, language code, time zone, OS version, Firebase Apple app ID, and bundle ID in order to target parameters that are based on this data. OS version and SDK version are also collected and aggregated to understand usage trends and inform product direction.

Usage dependent

If Remote Config is used together with Google Analytics:

  • Collects user properties obtained by the Firebase SDK for Google Analytics in order to target parameters that are based on user property conditions.
  • Collects the first_open event timestamp obtained by the Firebase SDK for Google Analytics in order to target parameters that are based on first open time.

If Remote Config personalization is used:

  • The data obtained by the Firebase Remote Config SDK and the events obtained by the Firebase SDK for Google Analytics can be used to construct predictive models and measure the performance of those models.

Firebase sessions


Always collected

  • Collects metadata about app performance, such as the bundle ID, OS information, SDK version, and network connection type to monitor app quality.
  • Collects usage data such as the time an app was backgrounded to group performance metrics into user sessions for filtering usage by session.

Cloud Storage


Always collected