It's the game's 15th anniversary so it'll be 50% off for 5 days! Link here: https://itunes.apple.com/us/app/king-of-dragon-pass/id335545504?mt=8
Fantastic game and well worth the full asking price. Definitely worth picking up for $4.99. This is one of those games that I go back and play over and over again because there are different ways you can approach the game (i.e. a balanced clan or an aggressive war clan), there is a short or long game, there are multiple difficulties. There is just so much to experience and so many events that just pop up randomly and you get to experience them differently depending on your reaction to the event.
After hearing a lot about how good this game is, I decided it would be the next thing I add on iOS and added it to my watch list. That was yesterday; now I get it for half off when I was thinking maybe I'd wait until Christmas and save a couple of bucks. Crazy amount of depth in this game.