"Planets" is a straightforward 2D or 3D view of the heavens by Q Continuum, augmented by some location-based gyroscope action. This is especially useful in the 3D view, as it allows you to get a look at the constellations and planets as you turn and point your iPhone or iPad. The 2D view provides a some useful information at a touch, such as rising and setting times of planets, the sun.
Great for avid star gazers as well as those who may still be doing celestial navigation. And it is FREE!