Find my network at events: how a crowd helps a tag

How the network works without a single mast

The service your tag uses is not a phone network. There is no mobile mast, no SIM and no data plan in the tag. The tag broadcasts a short, anonymous Bluetooth message at intervals. Any Apple device nearby that is signed in and has the setting on can hear it, add its own position and pass the sighting to Apple, encrypted so that only the owner's account can read it.

That design is what makes a Locata Tag cheap to run, and it is also the source of every limit in this article. Coverage is a function of how many Apple devices are close to the tag, not of how far the nearest transmitter is.

Where a crowd genuinely helps

At an event the arithmetic favours you. A few hundred people in a field is a few hundred phones, and a fair share of them are iPhones that sit in pockets with Bluetooth on. A tag left on a wall near the entrance will probably be heard within a minute or two.

• Entrances and car parks. People cluster and queue, and phones are within a few metres of the ground.
• Food stalls and viewing areas. The densest crowd is also where bags are put down.
• The walk out. Everyone leaves at once, so a tag dropped on the way is heard by dozens in minutes.

Where a crowd does not help

The same logic fails after people go home. A tag left at a field edge at 11pm, with the last cars gone, may not be heard again until the morning. The pin you see will be the last sighting, which can be several hours old, and a long, lonely lane has almost no relay at all.

Two other limits are worth stating. First, the network tells you where a phone last heard the tag, so a bag carried off by someone else will show the route only as far as new phones pass it. Second, this tag has no Precision Finding. Within range you follow the sound, not a direction.

Reading the result sensibly

Treat any pin as a place to start looking, never as an address.

Packing for an evening out

Think of the tag as a back-up for the one thing you cannot replace. Put it in the bag that holds keys, a purse and gloves, zip the pocket and ring it from the Find My app before you leave the house. If there is a travel element, such as a coach to a display, the same habit carries over to hold luggage.

How Locata Tag helps

The Locata Tag works with Find My on an iPhone and is sold as a box of two, so a bag and a coat can each carry one. It rings from up to 60 m, reports through the network beyond that, and the coin cell is a CR2032 you buy almost anywhere and swap yourself. It is rated IP67, so a wet field does not trouble it.

It will not make a quiet field busier, and it will not point at the bag. What it gives you is a chance of a recent sighting where there are people and a loud sound once you are close. See the Locata Tag or go to the checkout.

Frequently asked

Does Find My work in a field with no signal?

Yes, in the sense that the tag needs no signal of its own. It needs an Apple device within Bluetooth range to hear it, and that phone needs some connection to pass the sighting on, which may come later when it reaches coverage.

How quickly does the Find My network find a tag at a busy event?

There is no promised time. In a crowd a sighting often appears within minutes, while in an empty location it may take hours or may not appear until someone walks past.

Can a crowd stop a tracker working?

It does not block the network, and it generally helps by adding relay phones. Bodies can weaken the short-range Bluetooth link a little, so ring the tag from close by rather than across the field.

Is the Find My network the same as GPS?

No. A tag has no GPS receiver. The position comes from the phone that heard it, so it is only as precise as that phone's own location and the time of the sighting.