The app "Money of the World" is made of several modules. You will find :
. articles with rich contents about the countries and their monetary systems,
. multiplayer online games to challenge your knowledge gained from the contents,
. a currency database and other features to share information and collectibles within the Community of Collectors.
Enjoy!
(N.B. due to some functionality which allows the user to search the definition of words in the apps contents on the web, the rating is set to Ages 17+ for a better control of the younger users).