First of all, go enjoy the wonderful trailer for this game. If you're not sold on Leviathan Warships (US$4.99 on the App Store) after watching that, then I'm not exactly sure what else you want.
Leviathan Warships is a turn-based naval strategy game. Your job is to guide a series of ships through watery battlegrounds, leading them turn by turn against your opponents. The game is similar to Bungie's Crimson: Steam Pirates, in that you guide ships around by dragging them, but it's much more complicated.
You can aim each ship's guns separately, upgrade your ships as you