Sky Map uses your phone's compass and GPS to determine which part of the sky you're looking at and gives you a labeled map of the relevant stars, constellations, and planets. As you turn to explore, the map updates dynamically. Type an object in the search window and onscreen arrows will direct you.
WIRED Layers for planets, constellations, and deep-sky bodies. Manual mode for touch-based exploration.
TIRED No background info on objects. An augmented-reality mode would be nice.