App Rejected on 17.2 clause. Asking for email ID

Question

My app is a sync solution (imagine dropbox). The user needs to sign in to access the app\'s features, and if he does not have any account already created, he can sign up.

Answer 1

I also Faced this kind of Problem and my app also Rejected due to this.And Again I Changed my App flow Like User Registration will be Optional. User can See all the Feature of the app with out Registration by skipping this step.If he want to do something user-specific then you can ask to register such as : (user like,comment,photo upload etc) or else he can use the contents and features which are public.

in Case of in-app Purchase You can Prompt user that if He will Register with your app he can able to use this Content in his all devices.

It would be appropriate to make it clear to the user that registering will enable them to access the content from any of their iOS devices, and to provide them a way to register at any time, if they wish to later extend access to additional iOS devices