[mrtksn]

For games, there’s Game Center in iOS. If that’s not an option, you can provide an option for the user to enter their e-mail, phone number or use “sign in with” service. Usually you can put it in the settings together with a badge seeking their attention.

The idea is that, they already created an account by launching your code, so you don’t have to ask for account creation. Just ask for the information that is necessary to run your services and you can provide an optional method for account recovery.

[mastazi]

As a user who has switched back and forth between iOS and Android multiple times, Game Center isn’t gonna cut it for me. But I see how it could be enticing in some use cases.