Hey All, NASA has a FREE Android app.

You can find a huge collection of images, videos, mission information, news, NASA TV and other featured content. It is also completely free. :)

My favourite feature is Sighting Opportunities, which uses your phone's GPS to suggest when you may be able to see objects such as the ISS.

There is also a launch schedule calendar, I'm looking forward to Juno's launch on the 5th August (more on that mission soon).