Flags of All Countries of the World: Guess-Quiz is a free trivia application available on Android that helps users learn national flags and country capitals. The app is designed to be educational and entertaining at the same time. It offers six levels of difficulty ranging from well-known flags to the most difficult ones. Users can browse all flags, maps, and capitals in the app without guessing using flashcards or a list of all countries, capitals, maps, and flags.

Moreover, each level includes five tests that challenge users to identify flags, guess the flag of the country shown in the picture, select a country flag from the six suggested, or play a Yes/No game. Users can also play a time game where they have to give more than 30 correct answers to get a star in just one minute. The app is available in 9 languages, including English, German, and Spanish, making it accessible to a wider audience. Flags of All Countries of the World: Guess-Quiz is an excellent tool for students of world geography or anyone who wants to learn more about national flags and country capitals in a fun way.