IDFA support
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This guide outlines the steps required to support the IDFA message as part of
the UMP SDK. It is intended to be paired with Get
started which gives an overview of how to get your app
running with the UMP SDK and the basics of setting up your message. This
guidance is specific to the IDFA message.
Prerequisites
Update Info.plist
If you plan to use the UMP SDK to handle Apple's App Tracking Transparency (ATT)
requirements, make sure you've created, configured, and published your
IDFA explainer message
in the AdMob UI.
In order for the UMP SDK to display a custom alert message in the iOS system
dialog, update your Info.plist to add the NSUserTrackingUsageDescription key
with a custom message string describing your usage.
<key>NSUserTrackingUsageDescription</key>
<string>This identifier will be used to deliver personalized ads to you.</string>
The usage description appears as part of the ATT dialog when you present the
consent form:
Then, link the AppTrackingTransparency framework:
Your app now shows an IDFA explainer message prior to the IDFA ATT dialog.
Testing
While testing, remember that the IDFA ATT dialog only appears a single time
since
requestTrackingAuthorization
is a one-time request. The UMP SDK only has a form available to load if the
authorization status is
ATTrackingManagerAuthorizationStatusNotDetermined.
To make the alert appear a second time, you must uninstall and reinstall your
app on your test device.
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2025-03-11 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-03-11 UTC."],[[["This guide provides steps to integrate the IDFA message within the User Messaging Platform (UMP) SDK for iOS apps."],["Before proceeding, complete the UMP SDK setup and create an IDFA message in AdMob."],["Update your app's `Info.plist` with `NSUserTrackingUsageDescription` to present a custom message within Apple's App Tracking Transparency dialog."],["Remember to link the `AppTrackingTransparency` framework to display the IDFA explainer message before the ATT dialog."],["For testing, reinstall the app to reset the IDFA authorization status and see the dialog again."]]],["To support the IDFA message with the UMP SDK, complete the \"Get started\" guide and create an IDFA message. Update the `Info.plist` by adding the `NSUserTrackingUsageDescription` key with a custom message. Link the `AppTrackingTransparency` framework. During testing, note that the IDFA ATT dialog only appears once unless the app is reinstalled, due to `requestTrackingAuthorization` being a one-time request and the status needs to be `ATTrackingManagerAuthorizationStatusNotDetermined`.\n"]]