If you have an iPhone or iPad, you might want to see the Top Charts in Apple App Store. Surprisingly, even Flightradar24 Pro also ranked the highest for Paid Apps. As the MH370 still catching headlines as unresolved mystery, many people put an interest in air traffir radar just to see the planes all over the world move in real-time.
With detailed map, one can simply identify planes flying overhead by simply pointing the device at the sky. But of course, one need a device with GPS capabilities.