I would like to spread the word of an addicting and fun trivia game my friend created for Android devices.
It is called "True or lie trivia fact game". They updated the facts very often, so it is really cool to play it during long waits at airports or elsewhere..
It can be downloaded at Google play: https://play.google.com/store/apps/details?id=com.Syllora.True_or_lie
Please try the game yourself.