Mobile Observatory is a free tool that is designed for everybody, from casual amateur astronomers to professional astronomers and astronomer enthusiasts. It is the perfect tool for anybody interested in the sky's wonders, from the occasional sky gazer to the passionate amateur astronomer.

Key features:

Live mode: Point your device to the sky and use the orientation sensors to get the current view of the sky, the times of rise and set of any object, current positions, and apparent views of the planets.

Moon phase: Track the phases of the moon. It is a very useful feature, especially for the lunar calendar enthusiast. It gives you the current phase of the moon and the length of the phase. You can track a specific phase of the moon and get the exact day of the current moon phase.

Apparent motion: Track the apparent motion of the objects in the sky. This is useful for finding out when an object will be visible to you. If you are planning a trip to another city or country, you will be able to calculate exactly when the object will rise and set.