V-Flyer

I've come across this iPhone App Flightradar24

Flight-tracking app around the world include:
* Planes moving in real-time
* Comprehensive information for each individual plane, including route, speed, altitude and more
* Augmented reality view – identify the planes flying overhead by simply pointing your phone’s camera to the sky
* Easy to search for a specific flight
* Filter by airline, altitude, speed and more
* Flight trails and callsigns directly on map
* See airline logos in connection with the aircraft

Its £1.99 but great deal of info on it

https://itunes.apple.com/gb/app/flightr ... 69612?mt=8

Cheers!
Flightradar24 is also available as a feature limited free version (only shows flight numbers).

Also available is Planefinder Free which gives registration numbers and Planefinder AR which is an augmented reality version. Not sure if they're free on iPad.

So try before you buy!