billing class question

i want to get real-time flight location and altitude from flightXML.
there is different features each class
which class i have to?

You have access to all classes. The classes only reflect the price you will be charged for using each function.

To get the most recent position for any flight, InFlightInfo will work. flightxml.flightaware.com/soap/ … FlightInfo

If you want general status about the flight (not necessarily position), then FlightInfoEx is better. flightxml.flightaware.com/soap/ … ightInfoEx