Most of our iOS users tap "Ask App Not to Track". What can we still measure?
Most of our iOS users decline the tracking prompt, so iOS numbers look thin next to Android. What's still measurable for them?
Answer from the Linkrunner team
User-level attribution for opted-out iOS users is largely gone, but five methods still work. SKAN and AdAttributionKit give aggregate, delayed, campaign-level postbacks with conversion values. Deterministic matching works wherever a consented or first-party identifier exists, such as a click ID carried through web-to-app, or the Apple AdServices token for Apple Ads. Probabilistic matching is a limited fallback that Apple's rules restrict, so ask any vendor how theirs complies. Web-to-app flows that start on your own page and carry a click ID are the main route to user-level iOS data. First-party events sent from your backend tell you what users did, even if not which ad found them. Linkrunner is deterministic-first and uses IP matching only as a last resort. One caution: per Apple, swapping the IDFA for a hashed email still needs ATT permission. More on the web side: https://linkrunner.io/blog/what-is-web-attribution
More on this: linkrunner.io/blog/privacy-preserving-attribution-after-att