[re-posted to a more prominent forum, sorry] I'm looking for a sketch or drawing app for an iPhone 4. I have no artistic ability, but sometimes when taking notes in a lecture or for an idea, it helps to draw a simple line drawing. The ideal app wouldn't just save a raster image, but would offer simple line straightening, snap-to points, curves, and so forth. And, it would OCR hand drawn characters into text! Does such an app exist, or something close?