Great idea, unique app
As far as I know this is the only app of its kind. Ive found it helpful as Im learning Core Animation, because I can try something and see the results immediately. That said, compared to an app such as PaintCode, which is similar but for static graphics, the build quality of this app is pretty poor. Its just not polished in any way. And its definitely buggy. Its basically a beta version at best. I hope the developer continues on and makes it better, and also recruits some UI help, because if the quality were on par with PaintCode I would love it.
Dh74 about QuartzCode