Was thinking the same thing before where if I'm NOT at my Home Wifi network it would trigger. But then I couldn't think how to avoid alarming the house if my wifi goes goofy for whatever reason, my house may alarm while I'm in the shower or something.
Maybe have a receiving device that when you push your Garage Door Opener button that comes standard in most cars these days, that's how you arm and disarm. And then you'd see the alert on your phone confirming it?
Just adding into your thought if it triggers other thoughts from the Community. I know this doesn't help your question.