It appears to be the dream device for every plane spotter - a smartphone application that uses augmented reality to track and display details of aircraft as they pass overhead.
Plane Finder AR is the new sister app for the Plane and Ship Finder iPhone applications, using the existing positioning data alongside AR technology to pinpoint the location of aircraft in relation to the user of the handset.
In theory, whenever the app is switched on and the user points it to the sky, details of every aircraft will be displayed on the device, such as flight number, aircraft registration, speed, altitude and distance from the user.
Plane Finder says only aircraft with ADS-B equipment will feature on the AR service.
Early days but reaction is rather lukewarm so far - with some reviews complaining about lack of coverage and accuracy for what is clearly a "nice idea" but struggling on the execution.
NB: Hat-tip Hackneye.