Just found this great pirate battle game for free. I would have paid for this one. Nice music, missions, great controls, upgrading, selling goods, and it looks great. English translation is pretty bad but doesn't hurt gameplay.
I bought WarShips some time ago and then tried Age of Wind, only to realize that they have the same graphics and physics engine and everything just feels the same. i don't know how the IAP works out, but without it it is just a bad clone.
I think they had to remove it for some sort of copyright stuff.