Lux Touch
If you loved strategy games like, Risk, back in the day; you might find a new bestfriend in the presence of Lux Touch. This is only the lite version of Lux Deluxe but you'll find that it's more than enough to give you a great time.
The game sees you looking to take over the world by expanding and owning continents. It features simple but colorful graphics, a somewhat complex gameplay (especially for those who have not tried Risk before) and a cool interface that's heightened by the touch function of the iPad and iPhone screen.
Worth trying out if you love any type of conquest game. The best part is, it's all available for free.