I did the 123 Sculpt app. This app is ok but it does not let you paint on top of an already made print. I tried to make an owl but had to change the animal because when I put a stamp or print of feathers on it, and tried to paint over it, the print went away. I then chose to do a dinosaur which in my opinion wasn't much better. The pre-made structures are not very fun to play around with because if you change one small thing, your whole project will be messed up. This is my review of the 123D App.