VSCO CAM App for iOS
'VSCO Cam™ is an easy-to-use iPhone camera app with elegant, minimal processing options. The sleek interface and streamlined workflow enable you to quickly create beautiful images to share via major social media outlets and (coming soon) your VSCO Site.
VSCO Cam™ yields the best results using the iPhone 4s and iPhone 4, but also plays well with the iPhone 3gs, iPod Touch (4th Generation) and the iPad (2nd and 3rd Generation).'
This app costs $0.99