Flightradar24

Flightradar24 displays aircraft on a detailed map in real time and lets you follow flights around the world. Tap a plane to see its route, estimated arrival, aircraft type, speed, altitude and a photo of the actual airframe.

Point the device at the sky and the app helps identify the flight passing overhead. Other tools include a 3D pilot's-eye view, playback of earlier flights, arrival and departure boards for each airport with delays and weather, search by flight number, airport or airline, and filters. The Wear OS version lists nearby aircraft. The core features cost nothing, while the optional Silver and Gold tiers add a longer history, alerts and weather layers.

It suits travellers meeting a flight and aviation enthusiasts. An internet connection is needed because the data arrives live, so the map is only useful while you are online.