Slightly O/T, but does anyone else find the reviews for this app a tad, well, suspicious? Virtually all 5* and the wording of the reviews is all very similar.
The app prompts you to give it a five star review at various points. It presents you with a button that says "rate this app five stars" or something along those lines. I haven't pressed it so I couldn't tell you what process comes after that, if any.
How else would your friends get in touch with you to start trading drawings? It's unobtrusive and slick. The only facebook related things I've seen from this app are terrible drawings that people are sharing.
I shared my username with my friend via iMessage. I am very wary of adding any sort of application to Facebook, especially anything with "in-app purchase".