This app won’t save your life and it’s not intelligent
Now an active shooter would never carry a .50 BMG into an situation as reload time, weight and magazine size make it useless, if it were a sniper this would be practical. So the app didn’t pick up the BMG
The 9mm it did pick up at a distance of 6’ at height if 4,8’ but failed all others.
The AR15 again it picked up at 6’ at 4,8,12’ and at 12’ it picked up only at 8’ height when carried level to the body with a white shirt on but had to be a bright surface
The shotgun had similar effects as the AR at 6’ at 4’ and 8’ and 12’ at height of 4 and 8’ if held horizontally on a bright surface with enough time for the app to recognize.
These tests were done with an iPhone 12 max pro
This app is not a good substitute for common sense and situation awareness. At 6’ you’ll hear the crack of gunfire before you see it.
This app does nothing other than give a false sense of security