It also contains an information mode where you can click on different countries on the map and then it gives you information about the countries population, area, economy and government etc from US state department and CIA factbook.
This is the information mode:
This is the normal mode, the blue countries are countries that the user has answered correctly and the grey are the wrong answers:
Here is a link to Google play: https://play.google.com/store/apps/details?id=org.broome&feature=search_result#?t=W251bGwsMSwxLDEsIm9yZy5icm9vbWUiXQ
So what do you think about the app?