andylim writes: recombu.com has written up an iPhone app that lets you identify planes in the sky: "Point the camera at a plane and you'll see the flight number, aircraft registration, speed, altitude and how far away it is!" It's based on an existing service called Plane Finder, which tracks planes using something called ADS-B — the signals transmitted by commercial airliners with all this data the AR adds augmented reality into the mix.
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