Our company has a service which could be accessed from number of platforms by license key.
1. I want to create iOS app with two option on start screen "Enter your license key" and "Buy your license". Will it be approved by Apple?
2. Am I correct that the best way for in-App-Purchase in my case is to use "non-renewing subscriptions"?
3. Should I implement any additional "restore" functionality except entrance the license key?
I am very new in the iOS programming and would appreciate any help on my questions, thank you.