One of the best

Ive tried quite a few sketch/cartoonizer apps and this is by a mile one of the best. Easy and intuitive. Good variety of effects. Most importantly, effects are adjustable which makes it into a usable app, not just a toy to kill some time at the airport. My only regret is that its hi res is not really all that high 1280x720. Perhaps they can improve it in the future versions.

Candlelight2007 about Cartoon Photo - Sketch Guru, v1.3.6