I was just saying this morning that it seems to me that every iPad app has trouble with touch, including ProCreate, Concept, and PaintStorm. At first I thought the problem was just ProCreate but I think the problem is iOS/iPad itself. Because none are doing a good job with avoiding accidental finger marks. And when I try to rotate with two fingers it either misses a lot, or causes finger marks. Android on the other hand is very good across many apps and also have a feature to disable finger to make marks. With this enabled you can pan with just one finger and you can still pinch to zoom and rotate but the finger can't make a mark. It's great. Also, it never misses. Pinch to zoom and rotating always works. iOS fails 3 or 4 out if 10 tries.