Duolingo is a free education app that offers bite‑sized, gamified lessons for learning over 40 languages, covering speaking, reading, listening, writing, vocabulary and grammar. The courses are structured as full language programs and include progress tracking, rewards and community leaderboards to motivate daily practice. In addition to languages, the app provides separate courses for chess, math and music, each with interactive lessons and practice activities. The learning approach combines structured lessons with game‑like elements to keep users engaged while building practical language skills.