Almost every bad purchase in this category comes from treating these three as cheap, medium and expensive versions of the same thing. They are not. They solve different problems and fail in different places, and once you can see that, the rest of this site is detail.
Bluetooth crowd-network tags
How it gets a position: it does not. The tag broadcasts a rotating, encrypted identifier a few times a second. Any participating phone that hears it submits an encrypted report of where it was heard. You see the result.
What it costs: the tag, plus about a dollar a year in batteries. Roughly $30 over three years. There is no data cost for anyone to recover, which is why there is no subscription and structurally cannot easily be one.
Where it works: wherever there are participating phones. Airports, cities, suburbs, shopping centers — superbly. Fields, woodland, containers, empty roads at night — not at all.
Battery: about a year. Apple states more than a year per CR2032; Samsung states up to 500 days.
Failure mode: silence in thin crowds. The tag is working perfectly and telling you nothing.
Cellular GPS trackers
How it gets a position: a satellite receiver works out where the device is — free, and works anywhere with sky — and a cellular modem sends it over a mobile network.
What it costs: the device, plus data. From published rates: $8.95 a month on the LandAirSea Sync, which is $322 over three years; $12.95 a month paid annually on Spytec, which is $466. Prepaid-service devices collect the same cost in one payment instead.
Where it works: anywhere with cellular coverage, which is most of the populated world. It fails in dead zones, where it stores the track and uploads on regaining signal — and, counter-intuitively, often inside large steel-framed buildings where tags do better.
Battery: days to months, dominated entirely by reporting interval. The same hardware can last a week at sixty-second reporting or four months at twice a day.
Failure mode: two. A dead battery, and the company going away — the SIM, the servers and the app all belong to the brand. whistle.com now 301s to tractive.com and tryfi.com to fitracking.com; we checked both.
Radio direction-finding
How it gets a position: a handheld unit and a collar or tag talk directly over license-free radio. The handheld computes a bearing and a distance. No infrastructure of any kind is involved.
What it costs: a lot once, then nothing. No SIM, no network, no company in the loop, so there is nothing to subscribe to and nothing that can be switched off.
Where it works: open country, superbly, including places with zero phone coverage. Range collapses around hills and dense woodland, and is poor in built-up areas.
Battery: good, and you are charging a handheld as well as a collar.
Failure mode: the position exists only on the handheld in your hand. No app, no alert while you are at work, no map from the kitchen. You have to be out there.
And a fourth: satellite
Worth naming because people searching for “no SIM” land on it. Satellite communicators like the inReach Mini 2 talk to satellites rather than cell towers, so coverage is genuinely global. There is no SIM — and satellite airtime is its own subscription, so SIM-free is not fee-free. It is a person-safety product rather than an item tracker.
The matching table
Around people, cheap, good enough: Bluetooth. Keys, wallet, luggage, tools, camera bag, a dog in a suburb, a car in a car park, a bike in a city.
Anywhere with signal, live, worth paying for: cellular. A car you want recovered, a dog that works a field near coverage, a person at risk of wandering, a trailer on a road.
Off-grid, live, free forever: radio. Hunting dogs, moorland, forestry, any genuine dead zone. The forgotten option and frequently the right one.
Beyond all coverage, for a person: satellite.
The three mistakes this page prevents
Buying cellular for a job a tag does. $484 over three years to track a suitcase that lives in airports full of iPhones.
Buying a tag for a job that needs cellular. A tag on a dog that works a field is silent at exactly the moment you needed it, and that is not a saving.
Not knowing radio exists. Rural dog owners are sold cellular collars that fail in the valley their dog always heads for, when a radio system would work there and cost nothing to run.
Combining them
The technologies are complementary rather than competing, and the best setups use two.
Cellular plus Bluetooth on anything valuable: the cellular unit does live tracking, and a hidden tag covers the two failures it cannot — flat battery, and being found and removed.
Radio plus Bluetooth for a rural dog: radio for the fields, a tag on the same collar for the day the dog ends up in the village.
In both cases the second device costs about twenty-five dollars and has no running cost.
One last way to tell them apart
A simple test that works every time. Can this device tell me where the thing is while I am a hundred miles away and nobody is near it?
Yes means there is a SIM and a cost. No, but it tells me where it was means Bluetooth. Yes, but only if I am standing outside with a handheld means radio. There are no exceptions.
