Singdu

Many language apps teach through fixed courses, isolated vocabulary, and generic exercises. Singdu starts with songs people already want to hear. Each song becomes an interactive lesson with synced lyrics, line-by-line translations, tappable words, and lyric quests. It currently supports seven languages, with more coming. Learners can choose songs by difficulty, build XP and streaks, learn with friends, and control a big-screen KTV experience from their phone.