It's free. But has a lot of bugs. I set fps to 25  but the footage is saved with 24 fps. Very inconvenient interface - you'll never manage to precisely select shutter speed. Predefined ISO's shown as -1 on OSD. Having this  the only benefit to stock camera is RAW format and  maybe higher frame rates for video. But anyways thank you for making it free.
April 23 2017