1. What it is and how it works

A GPS tag is a small electronic "tag" or keychain that attaches to items like a bag, keys, laptop, bicycle, or even a dog's collar. The main objective of the tag is to enable a quick search for the item if it is stolen, lost, or forgotten. The device is small and lightweight (usually around 10g), so it can be used to find even small items.

Unlike full-fledged GPS trackers (universal, automotive, for people and animals), the tag works on a different principle. It does not show your real-time location via satellites but periodically sends a short radio signal (usually Bluetooth). When a smartphone participating in the respective search network is nearby, it "hears" the tag and transmits its location to the "cloud," after which it is displayed on a map in the app.

The tag transmits a signal that is captured by nearby devices, after which its location data is sent to the cloud.

The following technologies may be used in modern tags:

  • Bluetooth Low Energy (BLE) - the primary way to "talk" with nearby phones and transmit the location signal.
  • Ultra Wideband (UWB, "ultra-wideband" communication) - provides more accurate navigation at short distances, specifically showing direction and distance to the tag down to centimeters. This technology is useful if the "keychain" is lost somewhere nearby, in the same room, between cushions, under the bed. However, note: for the technology to really work, the connected smartphone must also have a UWB module. Such models are not widely available yet. For example, UWB is supported by Apple AirTag (with a built-in U1 chip), Samsung Galaxy SmartTag+, and Galaxy SmartTag2.

UWB technology provides more accurate navigation,
allowing the app to display the distance to the tag down to centimeters.

Thus, since the tags lack a built-in GPS module and do not obtain data from satellites, there are limitations in their operation related to the Bluetooth range. Theoretically, the signal range reaches 100 meters, but in practice, it all depends on the surrounding conditions. The Bluetooth signal is significantly weakened by various obstacles: concrete walls, water, metal. Simply put, if the tag is lost nearby, your smartphone will see it directly, if slightly further, but within Bluetooth range, the connection may be unstable, but the app can still update the coordinates.

What if the tracker is at a long distance? Then other devices participating in the search network come into play. These can be smartphones, tablets, laptops with the same search system installed as on the tag (for example, an iPhone in the case of an Apple AirTag). The gadget picks up the tag's signal and transmits information about its location to the "cloud," and its owner will not even know about it - everything happens encrypted and in the background. The problem is that in isolated places with no people and, consequently, no gadgets (forest, mountains, a dacha tens of kilometers away from settlements), the search tag will be of no use. In this case, it effectively "goes silent," continuing to emit a Bluetooth signal, but no one is receiving or transmitting it. However, in major cities, densely populated areas, airports, and shopping centers, search trackers work fully.

From all of the above, another conclusion can be drawn: search tags are primarily intended for finding stationary, immovable items - for constant online monitoring and tracking of moving objects in real-time, it is better to choose a tracker with GPS, a SIM card, and data transmission via satellites and the mobile network. Although, despite this, tags are often chosen for pets - possibly in the hope that someone's iPhone will be nearby the runaway cat.

Search tags are primarily intended for finding stationary items:
keys, wallet, documents, bag, suitcase, laptop, and others.
Popular Search GPS Tags

2. Connection and Ecosystem

The main "pitfall" when choosing a tag can be compatibility with your smartphone. At first glance, all trackers appear the same, but in practice, it all comes down to the manufacturer's ecosystem, as tags interact with the server and app, as well as with millions of other devices in the same system. For example, Apple AirTags are fully tied to the Apple ecosystem and connect only to iPhone, iPad, or Mac via the Find My app. To activate AirTag, you need an Apple ID and iOS 14.5 or newer. On Android, however, AirTag simply does not connect or track.

Samsung has a similar situation: Galaxy SmartTags work exclusively with Galaxy smartphones that have the SmartThings app installed and an active Samsung account. The location is determined using the SmartThings Find network, which connects all Galaxy smartphones and tablets.

But there are also universal models. Tile, Chipolo, Nut, and other brands' tags work with any smartphones running Android or iOS because their ecosystems are based not on proprietary services but on their own cloud platforms. To work, you just need to install the proprietary app from Google Play or the App Store. Thus, if you have a Motorola, Xiaomi, OnePlus, or another brand's smartphone, it's better to choose a tag with universal connectivity.

The features of connection and the ecosystem are key factors when choosing a search tag.

However, the next problem could be the density of the ecosystem, meaning the number of devices that can "hear" the tag and transmit information about its location. The more such devices around, the higher the chance the tag will be found quickly.

One of the world's largest geolocation networks is Apple's Find My. It connects hundreds of millions of iPhones, iPads, Macs, and Apple Watches, so AirTag is "visible" almost everywhere. In big cities, Apple's network is so dense that a lost item usually updates its coordinates every few minutes.

Apple's Find My is one of the world's largest geolocation networks with millions of connected devices.

Samsung is actively developing its own SmartThings Find system, which connects all Samsung Galaxy smartphones, tablets, and smartwatches registered with Samsung accounts. It is of a smaller scale, but Samsung devices are quite popular, especially in South Korea, Europe, and Asia. Therefore, the chance of quickly finding a tag is also quite high.

Samsung has its own alternative to Apple's service - SmartThings Find.

Both Apple and Samsung devices help find tags even without installing a separate app - everything works in the background, automatically, at the operating system level. Unlike them, other brands like Tile require installing a separate app, and the scale of their networks depends on the number of users of these apps. For example, in the USA and Western Europe, these networks are quite dense - the tag can be detected by anyone with the app installed. However, in countries where they are less popular, the network is sparse, and the chance of automatically updating the coordinates is lower.

Popular Automotive GPS Trackers

3. Other Considerations When Purchasing

When choosing a search tag, apart from everything mentioned above, we also recommend considering the following aspects:

3.1 Size and Weight

Generally, all models are quite compact and lightweight, but still, some can be slightly larger, others smaller. Often, this difference doesn't matter much, but it all depends on usage features. For example, size affects visibility: a large tag is more noticeable, which can be a drawback if it needs to be attached to something like a suitcase, luggage, where it should be less visible. If we are talking about a tracker for animals, for cats and small dog breeds, smaller and lighter devices are preferable as they'll be less obtrusive.

Generally, all tags are compact and lightweight, but still, when buying, we recommend paying attention to the device's size.

3.2 Durability and Protection

If the tag is often used outdoors, it should have a sturdy case to reduce the risk of damage or accidental detachment. In this case, the level of IP protection, meaning protection against water and dust, is also important. For instance, AirTag has an IP67 rating, meaning the device is resistant to rain, splashes, and even temporary immersion in water.

3.3 Mounts and Accessories

Some models do not have mounts, making it difficult to attach them to a bag, keys, bicycle, or other items. In this case, you'll have to purchase a holder case and similar accessories, which incurs additional costs.

If the tag doesn't have a mount, you'll likely need to spend money on a case, straps, and similar accessories.

3.4 Battery Life

Often, trackers are powered by batteries, but there are options with rechargeable batteries. Batteries typically provide up to 10-12 months of battery life or more, after which they can be easily replaced with new ones. Rechargeable batteries have less autonomy but can be recharged without needing to buy a new battery. Ideally, the gadget should have a low-battery warning system to avoid losing the tag due to a dead battery.

3.5 Security and Privacy

Firstly, for safety, the tag and network should not disclose your location to others. Secondly, search tags should not be used for tracking. After the release of AirTag, Apple faced many cases where its trackers were used for theft, robbery, and stalking. As a result, manufacturers introduced protection mechanisms: if an unknown tag moves with you for an extended period, your smartphone will receive a corresponding notification.

3.6 Additional Features

Often, GPS tags are relatively simple devices with a limited set of capabilities, but they can have useful additional features:

  • Sound Signal - helps quickly find a lost item with the tag.
  • Find Smartphone - works on the reverse principle when you need to find not the tag but the smartphone it's connected to.
  • Alerts When Moving Away - the device warns that you are moving away from it. This is useful in cases when you accidentally leave items with the tag in a café, on a bench, and other places.
  • Movement Sensor (Accelerometer) - the device detects if it has been moved, shaken, lifted, or shifted, which may be important in attempted thefts.
  • Impact Sensor - the device detects if it has been hit or subjected to sudden force (e.g., a suitcase was overturned, a car moved, someone accessed the bag).
  • Smart Home Compatibility - some models have a button that can be assigned as a smart home remote.

4. Conclusion

To summarize, a Bluetooth tag can save a lot of time and nerves in case of loss or theft of a valuable item, but an incorrectly chosen model, on the contrary, will add quite a bit of headache. Therefore, before purchasing, we recommend carefully studying which ecosystem it is compatible with, evaluating the density of this network in your region, ensuring that the device works correctly with your smartphone, and also taking note of other characteristics like battery life, quality of mounts, and signal loudness. Only a tag that meets all parameters will be a successful purchase, not a useless toy.