Fathom
A fold-up naval battle for iPhone Duo
Fathom requires an iPhone Duo, opened halfway like a laptop.
Stand the top half of your iPhone Duo upright and it becomes your target grid. The flat half holds your ocean grid, your fleet and two wells of pegs, hidden from your opponent behind the upright half.
Everything happens by hand, the way it does with a plastic case on the kitchen table. Drag your five ships onto your grid. Call your shots out loud. Peg every hit and miss yourself, and mark each ship you sink. Nothing is scored for you.
Two players, two iPhone Duos, face to face. No accounts, no ads and no data collection.