We looked at the original Halftone app for iOS a couple of years ago and were impressed. The app has been completely rewritten and is more touch oriented , supporting vector graphics for smooth insertion of picture elements.
Halftone 2, which is iPad-only and was released today, lets you import pictures and create a real comic book look by adding bubbles, banners and other bold graphic elements to your photos. The app also embeds an image editor, so your photos can be filtered to have a more graphic look. There are also tools for fixing blemishes, and the usual contrast, saturation and brightness sliders. H