I've been having fun shooting with my iPhone 5s, especially with the 6X6 photo app. I have it set up on black & white, and the square format has been fun and challenging to work with. The app lets you save as a hi-res tiff, is it's great to get some meaty images off the phone that hold up well on the screen and hopefully in print!
As you can see, there is a nice film quality to the shots! I'll be posting more 6X6 images soon.