Endless ATC is a realistic and easy to play radar simulator. As an approach controller at the radar of a busy airport you guide as many planes as possible safely to the runways. This version has multiple airports and realistic features that add to the challenge:

• 9 airports (Amsterdam Schiphol London Heathrow Frankfurt Atlanta Hartsfield-Jackson Paris Charles de Gaulle New York JFK Tokyo Haneda Toronto Pearson and Sydney)
• wind and storms
• areas with altitude restriction
• traffic scenarios
• adjustable radar delays to increase realism.

That plus all the features from the free version including adaptive traffic rate pilot speech unlimited randomized gameplay. If you haven't tried the free version yet get it here:
https://play.google.com/store/apps/details?id=com.dirgtrats.atcradar

For detailed instructions see: http://startgrid.blogspot.com/2013/11/endless-atc-instructions.html