Yeah… Another free Android simulation game from Game Insight International ~ Airport City. It’s time to build your own airport now as an air traffic controller. Build hangars and runways. Send planes to the far corners of the globe. Increase your level to unlock new destinations and buy new types of aircraft… How good can you build your Airport City?

Airport City
Download Airport City at Android Market here.
Regarding these freemium games, it would be interesting to know in what ways the particular game lures you to spend money. Whether it’s time limited or provides just a few levels, or if it bugs you with notifications if you haven’t played it for a few days. Basically, the answer to “Free? So what’s the catch?”.
I suppose you don’t really play all these games so you can’t provide this info, or could you?
Most free games without ads have in-app purchase to get special items, new levels or speed up the game building process like this one. This is the way that developer can make money from free games.