Duolingo is an Android developer that has been active since 2013. The current app portfolio contains 2 apps, all of which are listed in the category "Education". In the Google rankings, Duolingo's apps appear in the top 100 in more than 10 countries. A popular app is Duolingo: Learn Languages Free
, which is highly ranked in several countries and, with over 100 million installs, is one of the most popular apps in Google Play.