GPS tracker vs Bluetooth tag — which does your pet actually need?
By the PawVigil team · Updated
Half the trackers sold are the wrong type for the pet wearing them. A Bluetooth tag is brilliant for finding a collar under the sofa and useless for a dog two fields away; a GPS unit does the opposite job and costs a monthly fee. Here's how to pick, honestly.
How each one works
Bluetooth tags (AirTag-style) have no location of their own: they're spotted by passing phones and reported back. Dense town, lots of phones, works well; countryside at night, nobody passes, nothing updates. GPS trackers carry a SIM and report their own position every few seconds to minutes — anywhere with mobile signal — which is why they need charging and a subscription.
Range and refresh
Bluetooth: around 10–30 metres direct, otherwise whenever a phone wanders past. GPS: unlimited with signal; live mode typically refreshes every 2–10 seconds, normal mode every few minutes to save battery. For a dog that bolts after deer, only GPS is useful.
Battery and weight
Bluetooth tags run a year on a coin cell and weigh under 15 g — fine for cats. GPS units weigh 25–40 g and need charging every 3–10 days; most makers say not for pets under 3.5–4 kg, which rules out many cats and small dogs.
Running costs
Bluetooth: the tag price, then nothing. GPS: £3–8 a month, or £30–60 a year prepaid. Over three years a GPS tracker costs £150–300 all-in. Worth it for one lost-dog episode; not worth it for a cat that never leaves the garden.
Which to buy
Indoor or garden cat, small dog on a lead: Bluetooth tag plus a QR ID tag covers 'collar fell off' and 'found by a neighbour'. Dog off-lead in open country, escape-prone breed (hounds, huskies, terriers), or a cat that roams: GPS, and check the weight limit. Anxious about both: GPS on the dog, Bluetooth on the cat.
What no tracker fixes
Microchip registration kept up to date, a visible ID tag (a UK legal requirement in public for dogs), and recall training. A tracker tells you where the dog is; it does not bring it back.
Frequently asked questions
Can I put an AirTag on my cat?
Yes for weight (about 11 g with a holder), but it only updates when an iPhone passes within range, so it's unreliable for a roaming cat in quiet areas. Use a breakaway collar.
Do GPS pet trackers work without a subscription?
Almost none do — the subscription pays for the SIM data. A few sell a 'lifetime' plan upfront; check what happens if the company folds.
How accurate is pet GPS?
Typically 3–10 metres outdoors; it degrades indoors or under dense tree cover. Live mode narrows it quickly once you're close.
Is a tracker a legal substitute for an ID tag?
No. In the UK a dog in public must wear a tag with the owner's name and address; the tracker is additional.