Yeah, this isn’t any kind of crazy technology there should be a way to do it with any device that has bluetooth and a processor.

All it does is listens for devices, almost like it would when you’re trying to pair your earbuds. It just compares the detected MAC addresses vs a list and sends you a notification/alerts you if there is a match.

You can do the same with Wifi (the kids used to call it wardriving, back when modems were a thing and pringles cans had appreciable metal contents) but the people for whom that information is useful will know how to do it on their own.