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Index/Topics/ATFP Impact on Analytics

ATFP Impact on Analytics

The impact of Advanced Tracking and Fingerprinting Protection (ATFP) introduced in Safari/iOS 26 on analytics and ad measurement

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Jan 19, 2026

What measurable impacts has ATFP had on analytics accuracy and ad measurement since iOS17/iOS26 rollouts?

Advanced Tracking and Fingerprinting Protection (ATFP) introduced in Safari/iOS 26 changed which browser signals are available to analytics and ad tech — blocking or stripping certain high‑entropy API...

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