Apple makes IDFA opt-in on app-by-app basis in iOS 14

Apple is expanding privacy protections in iOS 14 with a tweak to IDFA handling that makes it much more difficult for advertisers to track users.

The feature concerns Identifier for Advertisers (IDFA), a random device identifier tag that Apple assigns to a user’s device. Advertisers have long used the feature to track aggregate data without revealing a person’s identifiable information.

Apple’s iOS 14 makes the IDFA explicitly opt-in for all apps. That means apps will need to ask users permission before they can use the identifier for tracking.


A new popup box asks users if they would like to give permission for an app to “track [them] across apps and websites owned by other companies” to deliver personalized ads. Previously, Apple users had the option to disable the IDFA, though the toggle was buried in the Settings app.

This isn’t the only privacy-related change Apple has made in its new batch of software updates. A new Privacy Report feature in the macOS Big Sur version of Safari indicates that Apple is now blocking Google Analytics.

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