The iPhone 4S camera is one of the best consumer cameras available today. It's so good, a whole industry has flourished around allowing users to take full advantage of the camera's capabilities. For example, we've seen numerous apps that promise to make your images appear better than they really are. For those who want to take their phone photography one step further, there are a number of add-ons sure to make your images better. If you fall into that category, keep reading.