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How do AirTags work? AirTag, Tile, and Galaxy SmartTag Tracking, Explained

Smart tags like Apple AirTags don't use GPS, but can still keep track of your belongings.
January 17, 2023
Apple AirTag with Find My software
Eric Zeman / Android Authority

Smart trackers like the Apple AirTag and Samsung Galaxy SmartTag promise to help keep track of your luggage, wallet, and other personal effects. Indeed, they can come in handy if you tend to misplace your belongings or forget where you’ve left your car keys. Newer models can even inform you of their whereabouts remotely, allowing you to track them from a different city altogether. Here’s everything you need to know about how smart tracking tags like AirTags work.

Related: The best Apple AirTag alternatives


Most smart trackers, including Apple AirTags, don't use GPS to transmit their location. Instead, they use Bluetooth Low Energy (BLE) to signal their whereabouts to your smartphone. Some recent models also include Ultra-Wideband (UWB) technology, which enables them to offer positional guidance down to a few inches.


What is an AirTag?

new airtag with protective foil
Mark O'Neill / Android Authority

AirTag is an Apple-invented Bluetooth tracker the size of a US quarter. Compatible only with iOS devices, the AirTag can track anything from keys to wallets, pets, bicycles, and luggage. Due to their small size, they can be used to track almost anything. They can be hung from a keyring fob or slipped into whatever needs to be tracked.

The AirTag relies on Apple’s Find My network to work. Every time the AirTag comes within Bluetooth distance of any iOS device (around 10 feet), it pings the location of that AirTag to Find My, thereby updating its location on the map. If you have lost the item attached to your AirTag, you merely have to look at the Find My map to see its current location. You can also have the AirTag play a pinging sound so you can close in on its location.

You will get faster, more accurate location results if you live in a busy, more populated area. A bigger area means more people, which means more iOS devices pinging that location back to Find My all the time.

What technology does an AirTag use?

airtag precision finding

Smart trackers like the Apple AirTag and Tile Tag use Bluetooth Low Energy (BLE) to communicate with your smartphone. It’s worth noting that modern smart trackers also send out Bluetooth signals that any smartphone can pick up in the vicinity — not just your own. These nearby smartphones routinely upload your tag’s location to the cloud, allowing you to see its last known location on a map from anywhere in the world. Apple calls this the Find My network, while Samsung has a similar network called Galaxy Find.

While Bluetooth works well enough to approximate a tag’s location, it doesn’t help narrow down the search once you’re within a few meters of it. For this reason, a handful of tags now also include Ultra-Wideband (UWB) technology.

Apple AirTags use both Bluetooth and Ultra-Wideband (UWB) technologies to signal their whereabouts.

In a nutshell, UWB is a short-range wireless communication protocol that co-exists alongside existing standards like Wi-Fi, Bluetooth, and NFC. Unlike those protocols, however, UWB enables exact location tracking down to a few inches. This allows your phone to literally guide you to the tag’s exact location once you’re within UWB range, as pictured above.

Modern flagship smartphones, including the iPhone 14, Pixel 7 Pro, and Galaxy S22 series, support UWB. As for smart tags with UWB support, you’ll have to choose between the Apple AirTag and Samsung’s Galaxy SmartTag Plus.

Don’t worry if your smartphone doesn’t include UWB or you’ve purchased a Bluetooth-only tracker. Virtually all tags on the market also feature an onboard speaker and can play a sound. You’ll need to be within range of the tag and use the companion app.

Related: How to tell if you’re being tracked by an Apple AirTag

How do AirTags, Tile Tags, and SmartTags work?

While Apple’s AirTags work with just about any modern iPhone, most other third-party trackers on the market will only work if you have the corresponding app installed on your device.

Upon unboxing a new smart tag, you’ll first be prompted to pair it to your account. This is usually as simple as holding the tag close to your smartphone and following the on-screen prompts. Once you’ve linked a smart tag to your account, you should be able to track its location from the accompanying app. With UWB, as explained above, your phone should also be able to offer positional guidance to the tag.

If you’re not within Bluetooth or UWB distance of a paired AirTag or Galaxy SmartTag, you may still be able to access its last known location. In fact, your chances of finding it improve if it’s in a busy or populated area. This is because strangers walking past your tag will have their smartphones automatically detect it and upload its location to the Apple Find My and Samsung Galaxy Find networks.

Next: AirTag vs Tile: Which smart tracker is best?


The AirTag uses Bluetooth, which works up to a distance of 30 feet. For accurate directions with UWB, you may need to be even closer. If you’ve lost the AirTag, you can use Apple’s Find My network to get the approximate location of an AirTag anywhere in the world as it also pings nearby Apple devices.

AirTags do not use GPS. Instead, they communicate with any iPhone or iPad in the vicinity. These devices then upload the AirTag’s last known location to Apple’s Find My network, which puts them on a map. Once you’re close enough, you can use Bluetooth or UWB to track down the AirTag’s exact location.

The AirTag does not work with Android even though it uses Bluetooth because only the iPhone supports the Find My app. Apple devices also have built-in software that tracks nearby AirTags (even those you don’t own) and upload their location to the cloud.

The AirTag uses a common CR2032 coin-type battery that lasts around a year on average. Your iPhone will notify you once the AirTag’s battery gets too low.

The AirTag has basic water resistance but cannot survive underwater and may even fail under a steady stream of water like a faucet or heavy rain.

AirTags are not magnetic. While it does include small magnets as part of the speaker, it’s not enough to stick to objects.

Aviation authorities in the US and Germany have confirmed that the AirTag is allowed to be carried in check-in luggage. However, this may depend on your specific airline elsewhere in the world.