I'm really curious about this as well. Last I checked, Safari is sandboxed w.r.t. session data, and something like time/IP seems really difficult to use reliably, e.g. if the user is interrupted and waits a while before installing the app. Or they could instantly install the app and wait a week before remembering to open it.
I'd love to use this service, but is the tracking guaranteed?
I'd love to use this service, but is the tracking guaranteed?