Really want to improve your iPhone photos? Get the Camera+ photo app. It pioneered several of the new features you find on the regular iPhone camera, but adds several more, as well as possibly the best set of filters available. It also allows you to make full use of the 16:9 screen and shoots photos to fit. I’ve used the OME camera on various iPhones and I’ve tried a lot of the other various camera apps available … but I always come back to using Camera+.