I want someone to complete a registration process on a website, then download an app from the Apple App Store, however I am unsure how we could track that someone did download an app and tie that download back to the registration.
What is the best I can hope to achieve with this and how would I go about implementing it?
Have them enter some kind of registration code or a username/password combo created on the website. As far as I know, the is no other way since you do not have access to that kind of information from the App Store.