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.

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 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.


Collected by default

Usage dependent

  • If the DeviceCheck provider is installed, collects the DCDevice token from DeviceCheck.
  • If the App Attest provider is installed, collects both the attestation object and the assertion object from App Attest.


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.

Collected by default

Usage dependent

  • 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.


Always collected

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

Usage dependent

  • 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.
  • Collects developer-defined portions of the Remote Config template and template metadata if the Firebase Remote Config SDK is also included in the app. This data includes Remote Config template version, rollout variant ID, parameter keys, and parameter values affected by active rollouts.


Collected by default

  • 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).
  • 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.

If Dynamic Links is used together with Google Analytics:

  • Automatically logs link interaction events via Google Analytics. To disable automatic event logging, remove FirebaseAnalytics from the app.


Collected by default


Always collected

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


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.


Collected by default


Always collected

  • Records the APNs token and associates it with a collected app installation ID that acts as the Firebase Cloud Messaging (FCM) registration token.
  • Collects device model, language, time zone, OS version, application identifier and application version for topic subscription and unsubscription.

Collected by default

Usage dependent

If Cloud Messaging is used together with Google Analytics:

  • Automatically logs notification interactions via Google Analytics. To disable this behavior, remove FirebaseAnalytics from your app.


Always collected

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


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.


Always collected

  • 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.

Collected by default

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.


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.


Collected by default


Always collected

  • Collects the Firebase SDK version and the Swift language version.
  • Collects the model name at invocation.