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.
compatibility-bugfix for iOS 12
Ratings and Reviews
Preview issue of app. Or requesting access to camera appears to have been fixed/resolved itself.
As noise-free as a D-SLR
So I saw the review in Wired magazine and decided to check it out. The idea behind this app is very simple, but the results are great. Only thing I'd like to see is a smaller gap between each shot, but I'm guessing that's a hardware constraint. Maybe the ability to sacrifice size for speed? Anyway, I was really impressed.
A DSLR will always take a better picture but apps like these push the teeny iPhone camera to its limits.
Up to six family members will be able to use this app with Family Sharing enabled.