UMSkinCheck provides tools to help users identify suspicious moles and keep track of them. Since remembering how new a mole is can be hard, you'll have years of scans to help you figure out if it appeared before or after that trip to the beach. Since pictures never lie,the pics saved in this app can provide an accurate representation of your moles for your dermatologist to see. The only con we saw was that you'll need a second person you're comfortable enough with to get naked and take pictures of your skin in various poses, including your bum.
This app also has other handy tools, including reminding you when you need to perform your self exam, and your yearly full-body scan. All in all, a very handy app that is free for download from the iTunes store.