I've noticed that several apps on the iOS App Store offer two purchasing options:
- Free app, then an in-app purchase of $x to the full version
- The full version of the app for an immediate purchase of $x
(Infuse is one such example)
Given that both purchasing methods get you exactly the same thing (that is, a working full version of the app) why would a developer go to the additional effort to make available both #1 and #2, rather than just have #1 in the App Store?
I'm looking for fact-based and not opinion-based answers. For example, a fact-based answer is that if you use Family Sharing then IAPs are not supported.