Capitals of the World is a free quiz app available on Android that helps users improve their knowledge of geography by learning the capitals of countries around the world. The app is developed by Vázquez Software and falls under the Education & Reference category.

The app features a trivia/quiz format that makes learning fun and interactive. Capitals of all the countries in the world are classified into five continents - Europe, Asia, Africa, America, and Oceania, and users can select a continent or all of them. The app also includes an interactive map of each country, where users can view more information about the country, including up-to-date information from Wikipedia.

To make things more interesting, the app stores the top 10 scores of users who have played the game, allowing users to compete against each other and fight against the chronometer to reach the top 10. The app also has an attractive design with sounds and animations, making it suitable for both children and adults.

Overall, Capitals of the World is a fully functional and free app that is available in five languages - Spanish, French, English, Italian, and Portuguese. It is a great way to improve your knowledge of geography while having fun in the process.