App Store

StoreKit 2 appAccountToken

The appAccountToken is a UUID your app attaches to a StoreKit 2 purchase. It appears in the signed transaction and in App Store Server Notifications, letting your server tie a purchase to a known user or affiliate without fingerprinting.

Published Jun 30, 2026 · Last reviewed Aug 30, 2026

Written by Attribloom Engineering · Reviewed by Attribloom Product · Last reviewed Aug 30, 2026

When a user buys, your app sets a purchase option carrying a UUID you generated. Apple echoes that UUID back in the signed transaction and in every server notification about it.

The token connects explicit referral evidence to a verified purchase without device fingerprinting. A deterministic identifier does not establish an ATT exemption: assess the actual data flow and obtain applicable permission before referral lookup or token attachment.

Frequently asked

Where does the appAccountToken come from?

Your app generates a UUID and passes it as a StoreKit 2 purchase option. Apple returns it in the signed transaction and in App Store Server Notifications v2.