I currently have an iphone 4S. Why are there no iphone apps for calibrating pc monitors ? Are there some technical reasons why the camera on the iphone could not be used with software for calibration of a pc monitor ? Something that would work similar to spyder3: http://spyder.datacolor.com This is something that i'm sure someone has thought about and have been discussed, but I could not find any information on the subject. It may be a silly question, but don't I know enough about the subject. Give me your thoughts guys and Gals.