The Find My network explained: a billion helping hands

What the Find My network actually is

It is not a service running somewhere. It is a behaviour that every reasonably modern Apple device performs in the background: listening for Bluetooth advertisements from lost things and reporting what it heard.

There is no opt-in ceremony, no app, no reward. Apple describes the network in terms of hundreds of millions of devices worldwide, and the arithmetic that matters is not the headline figure but the local one, how many of those devices pass within about sixty metres of your missing bag in an hour. In a British high street that number is large. On a Pennine footpath at seven in the morning it is zero. The network is not uniformly good; it is exactly as good as the number of people nearby.

That is why the same tag behaves so differently in different places, and why "the map has not updated since Tuesday" is usually a statement about geography rather than a fault.

What it costs the people helping you

Close to nothing, which is the whole reason it can be always-on.

The listening is a side effect of Bluetooth scanning that a phone is doing anyway. The report it sends is a few hundred bytes. There is no notification, no battery warning, no entry in a log the owner can inspect. A helper's phone may relay a dozen strangers' items in a day and the owner will never know, in the same way they never know their handset is measuring barometric pressure.

The reciprocity is implicit rather than negotiated: everyone helps everyone, permanently, and the network works because participation was never a decision anyone had to make.

Why the design is deliberately blind

A network of hundreds of millions of phones logging Bluetooth beacons is, on the face of it, a surveillance apparatus of the first order. What stops it being one is a set of choices made at the protocol level rather than in a privacy policy.

• The tag has no identity to leak. It broadcasts a public key that rotates on a schedule. Two sightings hours apart are not obviously the same object, so a third party logging beacons cannot build a trail.
• The helper cannot read what it collects. The passing device encrypts its own location with the key it just overheard. It has no way to decrypt the result. It never learns what it found.
• Apple cannot read it either. What lands on Apple's servers is ciphertext filed under an opaque index. The private key that opens it exists only on devices signed in to the owner's Apple Account.
• Only you can look. Decryption happens on your handset. The pin you see was worked out locally, not handed to you by a server that knew the answer.

This is a meaningful architectural commitment rather than marketing. It also has costs: Apple cannot help you recover a location history, cannot tell you who relayed a sighting, and cannot produce data it never held.

The other side of the same coin

A network good at finding a bag somebody lost is also good at finding a person somebody is following. Apple built the countermeasures into the same system, and it is worth knowing they exist and that they apply to every accessory on the network, not just Apple's own.

If a tag that is not yours travels with you for a while, away from its owner, your iPhone tells you. You can make the tag play a sound to locate it, read instructions for disabling it, and the industry standard developed jointly by Apple and Google means Android phones can flag the same thing. It is not perfect, an alert takes time to fire, by design, so that a shared item does not nag a family all day, but it is on by default and it does not need setting up.

Anyone selling you a tag should tell you this plainly. Unwanted-tracking alerts are a feature of the network, they work with third-party accessories, and a seller who avoids the subject is not doing you a favour.

What the network is not

It is not a live tracker. Sightings arrive when they arrive; there is no continuous trail, and there is no way to request one on demand.

It is not GPS. Nothing in the tag knows where it is, the position on your map is the position of the stranger's phone that overheard it, which is close enough to be useful and not close enough to point at a specific shelf.

It is not cross-platform. This is Apple's network, reachable from an iPhone or iPad running iOS 14.5 or later. Android users cannot set up an item on it, and any tag sold as working on both should be read very carefully indeed.

How a Locata Tag joins in

The Locata Tag is built to Apple's MFi specification for Find My network accessories, which is the qualification that lets it participate in everything described above. Add it in the Find My app under Items, give it a name, and from that moment passing Apple devices relay it exactly as they would one of Apple's own accessories. There is no separate app, no account of ours, and no subscription, the network belongs to Apple and using it is free.

At close range the tag stops relying on strangers and starts making noise: 80–100 dB from as far as 60 m, which is what finally separates "in this house" from "under this cushion". Turn on Notify When Left Behind if you would rather be told before the network has to get involved at all. It is IP67 rated and 9 mm thick, and its CR2032 lasts up to two years before you swap in a fresh one.

Two tags and two key rings come in every box, for under £15 a box with free UK delivery. see what is in one.