Some of my photos that I have taken using the iphone is with a few fun photography apps. Here are a few of my top ones.
100Cameras- this is a fun app that you can get many, many different filters. It's easy and very enjoyable to use.
HDR Pro- I love this app! The only thing is you have to stay very still when taking the two picture sin a row. But it's well worth it, and you get a lot of simple and fast chooses to enhance your photo. The photo that is on the notebook below was taken with the HDR Pro.