Sure, for anyone that understand the basics of computer programs it's obvious that you can't copy an app from your friend just by snapping a picture of the icon, but I don't think it's a good idea to rely on this assumption.
Of course if he didn't get it it's only my fault because the description is not clear enough (I'm not a native speaker) or the UI is not easy and intuitive as it should.
Any help would be highly appreciated!
1) The configurations or any settings will be copied along;
2) You won't have to pay for it.
I wouldn't bother with #1, but the review guy was probably pissed because of #2.
Your English is flawless, but I think you forgot that "sharing" is used in "file sharing" and is bound to attract people that don't want to pay for things. Thus they get double annoyed when they pay for an app that does not let them not pay for other apps.