The application cleans the blue stain in the center of the camera when the picture under fluorescent lights by iPhone4.
There are three levels of cleaning, please use the original photo to fit.
This app can separatly adjustable for center blue stain and around red stain.
FinderCam has simple feature.
This feature may be no needed for future OS improvements, as the author wants it too. Please use the meantime.
You can use this app for photos already taken, of course.