How will Branch determine whether or not the user has opted into ATT?

To provide continuity for all customers, we use the presence of IDFA to infer ATT opt in.

Additionally, Branch iOS SDK versions 1.39.2+ capture ATT opt-in/opt-out events when users interact with the new AppTrackingTransparency prompt. This update is optional, but provides additional data to help you understand your user flows.

Additional Resources