$$$

If there wasnt of course already ads all over the screen always, then you would get them popping up on you on immediate opening of the app or whenever youd answer a question. Also certain categories, excuse me MAJORITY of course are all needed to be bought... Not only that but you cant restart or leave without using in-game currency which you can easily rub out of if you do a quiz and not know some of the icons and wish to quit you then basically cant play.... Unless you buy more of course! Really though the developers are greedy mofs on this one, would not recommend getting this you cant even play without an app to close every 10 seconds or having to buy more stuff. Pathetic.

Tom Pake about Icon Pop Quiz