YES ;-)

Ive been using REASON since it came out and its my # 1 app for production.. This is like "REASON" for your iphone and I mean that!
At first I thought caustic would sound cheezy and kill my CPU. Wrong.. This app is stable, sounds great... It not all that intuitive but after u mess with buttons here and there and "READ THE INTRUCTIONS ! Youll want no other music app on your phone. Hopefully there have an update with more sounds but making your own is easy. If u have Propellerhead Reason youll see what I mean and your hear it too. I cant put caustic down! Im hooked
Caustic is the best app! Hands down.

Greggdx about Caustic