With mcamera you can control parameters that are not available in the standard camera app:
- Focus distance
- ISO sensitivity
- Shutter speed
- White balance
With manual control of shutter speed you can keep ISO as low as possible which will give you less noise on the photos. Long shutter speed would also give you opportunity to take photos with smeared elements such as car lights or smooth river water.
Terms of service: https://vdugnist.com/mcamera_tos.html