Assault Vector is an interesting sci-fi strategy shooter that's out right now for iPad and iPhone
Assault and vinegar
Assault Vector is an intriguing, lo-fi science fiction escapade that mashes together elements of a puzzler, a roguelike, and a strategy game. And it works pretty well.
You control a ship bobbing around on a hexagonal grid. Every grid space you move counts as a single turn. After your turn, the bad guys have a turn.
Different enemy ships have different arcs of fire, and if you come to rest inside one of them you'll take a hit. Land adjacent to an enemy, and out of their line of fire, and you'll get to shoot at them instead.
It all makes for a clever, reasonably fast-paced experience. You can tap on an enemy ship to see it's range, and use a hyper jump or a special laser instead of your usual turn.
At the end of a level you can buff up your spaceship a little, either adding more health, or extending the range of your super jump or your big cannon.
It's fun, it's simple, and it's surprisingly deep. The game is out on the App Store right now and it'll set you back £1.49 / $1.99 to give it a go.