Cosmic-Watch for iPhone
In the past few years, we have covered a whole host of awesome stargazing and astronomy apps. Cosmic-Watch for iPhone is another app that serves as an interactive learning tool for understanding the celestial sphere and movement of the sky.
The app provides you with a real-time world clock and lets you travel to the past and future. You can align the watch with the cardinal points, determine the exact time of sunrise, and do a whole lot more.
Cosmic Watch is also a solar eclipse detector. It also serves as a digital orrery. The app is available for under $4 at this time.