Download this app if: you want to test your world knowledge.
Challenge your friends at Geography with Geography Master!
Geography Master is a quiz composed of 3 games; Flags Master, Capitals Master and Pictures Master.
Match the country name to the flag in Flags Master, then move on to Capitals Master and try to guess as much capitals as you can!
Decent — There's a lot of these kinds of apps in the Market, but I appreciated the three categories of questions. Can be quite challenging at times.