"GPS trackers designed to be magnet-attached to a car which report their location via cell signal cost ~$20 on Amazon. You then tend to need to pay for either a

"GPS trackers designed to be magnet-attached to a car which report their location via cell signal cost ~$20 on Amazon. You then tend to need to pay for either a SIM card or a subscription to the device maker's service -- bringing you up to about the cost of an AirTag. These are much harder to detect, as you might imagine." Yes ... but Apple has built a mesh network to report the position of people who don't want to be tracked ... and clearly are being tracked. And it's very possible my own iphone is being used in the service of an evil actor. That feels ... different. Ethically -- if not technically. "It's tricky to make something that lets you find where you dropped your keys while walking the dog that can't also be used for nefarious purposes." This seems awfully blithe. I suspect you aren't a woman. Or that you don't have daughters old enough to live on their own.