iObserve makes your preparation of astronomical observations a breeze. It gathers automatically and easily all the information you need when observing the sky with small and big telescopes. It has been built from the ground up by an experienced professional astronomer.
iObserve is the astronomical app you were waiting for. It is a Mac app (10.9+) that allow you to push the preparation of your observations to a much higher level. It is a 6-years old app, and after more than 4 years as a paid app in the MacAppStore, it is now free. You can read here why it is so. Read below what others have said about it.