Photo Editing Test Patterns for iPhone

From Sudobility:

iPhone camera may not be the ideal replacement for digital camera. However, at 2MP, the photo can be printed to 4x6 inch prints with reasonable quality, especially after they are processed to improve the contrast and color saturation. Photo Editing Test Patterns include six commonly used image test patterns, resized to the same resolution as iPhone camera. You can review and save the test patterns to your camera roll. Then, use the patterns to test your photo app.

Note: The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.