I am developing an app for a client, where he wishes the app to be able to have users to sign up and try out the app for 14 days, after which they have to make a purchase to continue using the app.
My client does not want to absorb Apple's 30% cut for using Apple's in-app purchase mechanism. Initially I suggested implementing a 3rd party payment gateway, but it seems that Apple does not allow app that unlocks app functionalities via a 3rd party payment gateway.
My question is this: if we submit the app that allows users to sign up and login, but only use the app for 14 days without any form of payment mechanisms in the app to allow the user to continue using the app, will the app be rejected? As I was thinking to just have the payment gateway on a website, and during user sign-up, send the user an email informing them that they can go to the website to make a payment.
I know that Apple rejects trial/demo apps, but this is technically a full fledged app where users that purchased via the website will be able to login and perform full functionality. I will also provide Apple with a test account that is fully functional.
Thanks!