The iPhone photo sensor is very good except in low light conditions. You may use the integrated flash but sometimes you cant. This is exactly at this time that Fotomatic becomes useful.
Warning: you wont notice any difference if used with daylight. This app is effective only with low light condition.
Fotomatic takes quickly multiple shots and use a stochastic algorithm to combine them into a single photo. Noise is removed and light is improved by using information on *all* photos. You can get a photo with information even in virtually no light conditions
The new interface is simpler than ever: aim the subject and shot.
You just have to avoid moving only during the red flash on the screen (about 1 second). Then the application uses a fast processing algorithm to automatically adjust and combine images. Note that you can safely move when the processing has started.
Your photo is automatically saved in the film roll and you can review it to decide if you need another shot.