Wow.
This app is absolutely amazing! I was able to create a realistic pencil drawing on my first try, I experienced no lag. I can see myself using this app lots! The backgrounds are great too because the paper ones make the drawings look more realistic. Sure, there are a few problems, such as glitchiness with the colour selector (it can be worked around), and some small typos, but overall, this app is great and worth your time!
Purple melons about
MyBrushes for iPhone - Painting, Drawing, Scribble, Sketch, Doodle with 100 brushes, v1.2.0