The short answer
Bluetooth trackers contain no GPS. They report their position by being detected by other people’s phones passing nearby. That makes them excellent in towns and on busy routes, and close to useless in remote areas or for anything moving fast.
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The single most common misunderstanding about trackers is that they know where they are. They do not. They shout a short Bluetooth message, and any compatible phone that hears it reports the location on the tracker’s behalf. Everything useful and everything disappointing about them follows from that.
What this means in practice
- Dense areas work well. In a city, someone with a compatible phone passes most places within minutes, so the location updates frequently.
- Rural areas barely work. A bag lost on a quiet footpath may not be detected for hours or at all.
- Network size decides everything. Apple’s network is the largest by a wide margin because it uses every nearby iPhone. Google’s equivalent uses Android phones. A tracker is only as good as the network in your area.
- It is not live tracking. You get last known position, not a moving dot, unless you are close enough to connect directly.
Where trackers genuinely earn their place
The best use is not theft recovery, which they are mediocre at, but the everyday case: keys down the side of a sofa, a wallet left in a café, a suitcase that did not make the connection. Within Bluetooth range, precision finding with sound and direction is genuinely excellent.
Apple AirTag (2nd generation)
The strongest option if your household uses iPhones, because the finding network is the largest and precision finding is the best implemented. It needs an Apple device to set up and use — there is no Android app — which is the single most important compatibility check before buying.
What to know before buying
- Check the ecosystem. An AirTag is not usable from an Android phone, and Android trackers offer limited function on iPhone. Buy for the phone you actually have.
- Attachment is an extra cost. An AirTag has no hole in it, so a keyring holder is a separate purchase. Factor that in.
- Batteries. Most use a standard coin cell lasting about a year, user-replaceable. Check this rather than assuming — some sealed trackers must be replaced outright.
- Anti-stalking features exist and matter. Modern trackers alert people if an unknown tracker travels with them. That is a deliberate safety feature; it also means a tracker hidden in a stolen bag may notify the thief.
If a tracker shows your stolen property at an address, contact the police rather than going there. Location data is approximate, it may be wrong, and confronting someone over property is genuinely dangerous. Trackers are a tool for finding things you mislaid, not for conducting your own recovery.
Realistic expectations
Battery life around a year. Bluetooth range of roughly 10 to 30 metres for direct connection. Location accuracy that depends entirely on who has walked past recently. Water resistance sufficient for rain, not for submersion. Judged against those, trackers are genuinely useful. Judged as GPS devices, they will disappoint every time.
Frequently asked questions
Do Bluetooth trackers have GPS?
No. They rely on other people’s phones detecting them and reporting the location. That is why coverage is excellent in busy areas and poor in remote ones.
Can I use an AirTag with an Android phone?
Not for setup or tracking. Android can detect an unknown AirTag travelling with you as a safety measure, but you cannot use one as your own tracker without an Apple device.
How long do tracker batteries last?
Roughly a year on a standard coin cell in most models, and they are usually user-replaceable. Check before buying, because a sealed tracker becomes disposable.
Will a tracker help if my luggage is lost by an airline?
Often yes, and it is one of the strongest use cases. Airports are dense with phones, so the tracker updates regularly, and being able to tell an airline which terminal your bag is sitting in is genuinely useful.
Buy one for the things you mislay, not for the things you fear losing to theft. On that basis they are among the more useful small purchases in tech.
