Countries of the World is a free educational app developed by Socratica LLC for Android users. This app is perfect for those who want to learn about the world and its countries. It provides information about countries such as their capitals, populations, languages, GDPs, religions, flags, and much more.

One of the main features of this app is the quiz mode that allows you to test your knowledge of world geography. The app also includes audio to help with pronunciation, making it easier to learn. Another great feature is the interactive map that you can use to find countries, along with a search function and index.

Overall, Countries of the World is an excellent app for those who want to learn about the world in a fun and interactive way. With its extensive information and user-friendly interface, it's a must-have for anyone interested in geography and world cultures.