Bleach Bypass is a popular app for iPhone photographers that adds a cinematic quality to your images. It has just been updated with a bug fix for receiving images from other photo apps via PhotoAppLink. Also, the developers have added applied filter details to IPTC tags within output range.
This is a free update, if you have previously downloaded this app. If not, you can download it here. It retails for $0.99/£0.69/download,