Average Camera Pro
iOS Universal Photography
Average Camera automatically takes multiple pictures (immediately or after a timer expires), calculates the average picture out of these and normalizes the result, to make the lightest pixel become white. It is useful for producing low-noise pictures in low-light situations. Because of the long exposure time, you should not hold your iPhone in your hands, but lean it against something to get sharp results.
bugfix: app doesn't crash anymore, if launched with disabled camera-access