Item trackers that use Bluetooth or other wireless technologies, such as Wi-Fi or cellular networks, are generally safe to use on airplanes. However, it’s always best to check with the airline before bringing any electronic device on board. Some airlines have restrictions on the use of electronic devices during takeoff and landing, and some may require all devices with wireless capabilities to be turned off during the flight.
It’s also worth noting that GPS-based item trackers may not work on airplanes because they require a clear line of sight to the sky to receive signals from GPS satellites. As such, it’s important to choose an item tracker that uses a suitable technology for your needs, depending on where and how you plan to use it.