Another handy app to use your survey credits on :)
Stellarium Mobile Sky Map is a fully-featured planetarium for your phone. It shows a realistic and accurate night sky map, just like what you see with the naked eye, binoculars or a telescope.
The sensor control will also enable you to identify a star in just a few seconds, just by pointing the phone at the sky!
Thanks to HUKD
The desktop version has been around for quite a long time and is also worth a look, its a freebie. http://www.stellarium.org/
If you like this sort of thing, also be sure to check out www.spaceengine.org and be prepared to be blown away by that freebie.