Cortex Camera fixes one big deficiency with the iPhone’s camera: low-light noise. Or more specifically, the iPhone has no way to avoid cranking the ISO when shooting in low light. With a regular camera, you can just choose a longer shutter speed to keep the ISO low, steady the camera on a tripod or other sturdy base, and enjoy noise-free pictures taken in the dark.
And now you can (kinda) do this with your iPhone, using this sweet and simple app.