PicTapGo is a fabulous little app from from the RadLab people. If you are a Photoshop user and haven't checked out RadLab, you don't know what you are missing. It's like having a ton of Lightroom Presets and not having Lightroom. Plus they can be customized and saved for future use. Enough of that. Back to iphoneography.
Grandma's Tap Shoes and Crispity.
Their website with a video and gallery. PicTapGo.com