For Christmas this year my husband presented me with a fun set of lenses for my iPhone 4S. Since I take my iPhone wherever I go, I carry these lenses in my purse and whip them out when I need them. I love them!
These work with nearly any smartphone camera. They simply snap on with a little magnet that you attach to the back of your smartphone camera lens.
PhotoJoJo, a store we love.
Simply adhere the tiny disk to the back of the iPhone (there's even a little indent for the flash). I have all three lenses, which includes a fish eye, macro + wide angle and a zoom lens.
Here are some macros and zoom images taken with these lenses. You can also view them on my Instragram page.