Device Tracker: Find My Air is a free utility and tool application available on the iPhone platform. With this app, you can easily find lost devices by tracking their Bluetooth signal. The powerful Bluetooth tracker allows you to detect all Bluetooth signal emitting devices such as iPhone, iPad, AirPods, laptops, tablets, smartwatches, and more.

One of the main features of Device Tracker is the map tracker, which allows you to see the distance of your devices to you live with a distance score. You can also share your friends' devices with them and see their location on the map.

It's important to note that to use the premium features, you must have a premium membership, which can be subscribed to on a monthly or yearly basis. The app does not use GPS to track devices, so they must be within Bluetooth range to be tracked.

Overall, Device Tracker: Find My Air is a useful tool for locating lost devices using Bluetooth signals. It provides a convenient way to keep track of your devices and ensure you never lose them again.