Ah, alright, so it monitors the sensors and sends a notification either over SMS or Signal. Got that.
What I don't really get is the "event logs and captured media can be remotely accessed through a Tor Onion Service". Whose Tor Onion Service? Wow, my phone runs an Onion service? Did not see that coming.
I'm assuming the phone needs to be charged 24 hours a day because something like this will kill phone batteries within a few hours.