FlightStats – iOS app review
Bang for buck: Free!
Ease of use:
FlightStats is yet another flight status tracking app, and has a nice, easy-to-use layout. Search by a specific airline, or an airport and you will find the usual information on the departure date, time, gates, current status and the stuff.
You can get information about airports as well – current weather, weather in the next 7 days, and airport delay index.