This app syncs with the CIA factbook so I'm guessing it is all pretty accurate, or close to it. The quizzes are also a lot of fun because you have to match up the flags of different countries with either the name of the country or its capital city... This might sound easy but it soon gets difficult when you start coming up with all kinds of obscure places! I'm pretty awful at the quizzes to be honest but there is loads of information about each country to keep you occupied either way. What turned out as a simple challenge to pass the time, has taught me more than I could have imagined.