GPS trackers for dogs and cats

Does the animal leave, and if it leaves, does it leave where there are people?

A dog that bolts out of the front door into a suburban street is lost among phones. A Bluetooth tag in a waterproof collar holder will report its position within minutes and costs nothing to run forever. Buying a $250 three-year subscription for that dog is buying a capability you will not use.

A dog that works a field, jumps a fence into woodland, or disappears on a hike is lost away from phones. No tag helps. You need either cellular — which gives you a live map anywhere there is signal, for $252 or more across three years — or radio, which gives you a direction and distance from a handheld you carry, with no subscription at all and no dependence on signal.

Cats split the same way, with weight as an extra constraint. A cat that goes two gardens over is a tag job. A cat that genuinely ranges needs the cat-specific cellular trackers, because the dog modules are too heavy, or a featherweight radio tag.

This is the one thing we would most like pet owners to understand before they buy, and it has nothing to do with specifications.

A cellular pet tracker is not a device you own. It is a terminal for a service. The collar contains a SIM provisioned by the brand, it talks to the brand's servers, and the app that shows you the map is the brand's app. When the brand goes away, all three go with it and the collar becomes a plastic lump on a strap.

This is not a theoretical risk. While building this site we checked the HTTP responses ourselves: whistle.com returns a 301 redirect to tractive.com, a competitor, and tryfi.com returns a 301 to fitracking.com. Whistle was one of the two serious US pet-GPS platforms and its own front door now points at a rival. Anyone who bought a Whistle collar on a multi-year plan has learned something about subscription hardware the hard way.

Two kinds of device are immune. A Bluetooth tag runs on Apple's or Google's network, which belongs to Apple or Google and is not going anywhere. A radio collar has no network at all — the handheld talks straight to the collar, and there is no company in the loop that can fail. If you want a pet tracker you will still be using in five years, those are the two categories to look at.

On cats, use a breakaway collar. This is not a tracker opinion, it is a safety one: a cat collar that cannot release when it snags on a branch or a fence is a genuine strangulation hazard. Every cat collar we link to has a breakaway buckle, and if you already own a collar you like, check that it does before you add weight to it.

On dogs, check the weight against the dog, not against the collar. A 30 g cellular module is nothing on a labrador and a lot on a whippet, and a dog that is uncomfortable will work at it until it comes off.

GPS containment fences deserve a specific warning. They work by reading the collar's own GPS position and comparing it against a boundary you drew in an app, which means the boundary is only as accurate as the GPS fix. Under heavy tree canopy, GPS accuracy degrades to tens of meters, and a boundary that wanders by that much is worse than no boundary — it corrects the dog at random and teaches it nothing. On open land they do what they claim. Look up at your own trees before you spend five hundred dollars.