Here on the Constellations App by Richard Dibon-Smith youll find:
-Information on all 88 constellations --- the myths and the facts.
-A Binocular (and Naked Eye) Tour of the Stars.
-Drawn orbits of many binary stars.
-Star charts for all constellations.
-A Star Catalogue (The Flamsteed Collection) giving the properties of thousands of stars
-All kinds of information relating to the 88 constellations.
First the Greek myths of each constellation (or rather, of those constellations which have a myth). Then lots of data on many of the stars themselves, such as their visual magnitude, distance, and so on.
Star charts which show the curvature of the sky as well as an accurate picture of all neighbouring stars.
Finally, interesting items for study, such as binaries or variable stars, or deep sky objects.