Duolingo - Learn Spanish, French, and more!

Duolingo is a free language learning app available for iPhone and iPad. It offers bite-sized lessons in over 40 languages and helps users improve their reading, writing, listening, and speaking skills. Users can also learn math and music through the app. Duolingo has been recognized by numerous publications for its effectiveness and fun learning approach. The app is free to use, but users can purchase a Super Duolingo subscription for additional features, such as ad-free learning and unlimited hearts.