We have an application whose main functionality is to provide users subscription-based content. The user can set their preferences and then gets content based on those settings.
Currently the app doesn't have any login features but we're interested in adding them, so we could provide the users
- a possibility to store their settings in an account (i.e. they're available in all devices they use), and
- perks for registration, like free content.
In reference to submission guidelines 5.1.1 Data Collection and Storage
- ...
- (ii) If your app doesn’t include significant account-based features, let people use it without a log-in. Apps may not require users to enter personal information to function, except when directly relevant to the core functionality of the app or required by law. If your core app functionality is not related to a specific social network (e.g. Facebook, WeChat, Weibo, Twitter, etc.), you must provide access without a login or via another mechanism. Pulling basic profile information, sharing to the social network, or inviting friends to use the app are not considered core app functionality.
My question is, how likely it is for the app to pass review if we added a possibility to register and login, but there's still also the option to use without registration if the user prefers?
My gut feeling is that it should be fine as there's the option to use without registration, but I'd like another opinion too because building the feature is fairly expensive and it would be a shame to do it just to get bounced by review.