Privacy

iOS ATT (App Tracking Transparency)

Apple's iOS 14.5+ framework requiring apps to ask permission before tracking users across other apps and websites.

iOS ATT (App Tracking Transparency) is Apple's privacy feature that shows users a popup asking 'Allow [App] to track your activity across other companies' apps and websites?' Most users (70-85%) click 'Ask App Not to Track', blocking the IDFA (Identifier for Advertisers). Impact on Facebook/Instagram ads: Cannot track iOS users who opt out, attribution windows shortened from 28-day to 7-day, conversion data delayed 24-48 hours, and targeting accuracy decreased. Meta estimated ATT cost them $10 billion in 2022. Workarounds: Implement Meta CAPI for server-side tracking, use Aggregated Event Measurement (8 conversion events max), focus on Android users, and shift to first-party data strategies. ATT fundamentally broke mobile app advertising attribution and forced industry toward privacy-first tracking.

Related Terms

External Resources

Apple ATT

Frequently Asked Questions

What is iOS ATT?

iOS ATT (App Tracking Transparency) is Apple's privacy feature introduced in iOS 14.5 that requires apps to ask permission before tracking users across other apps and websites. Most users (60-80%) opt out, preventing advertisers from tracking their behavior and conversions.

How does iOS ATT affect Facebook ads?

iOS ATT reduces Facebook's ability to track conversions by 30-50% on iOS devices. This leads to under-reported conversions, less effective ad targeting, and difficulty optimizing campaigns. Meta recommends implementing CAPI (server-side tracking) to recover lost conversion data.

How can I fix iOS ATT attribution loss?

Fix iOS ATT attribution loss by: implementing Meta CAPI for server-side tracking, using Aggregated Event Measurement (AEM) for iOS campaigns, shortening attribution windows to 7-day click, focusing on click-only conversions, and using first-party data for targeting.

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