Duolingo UI design & app screens

Duolingo is a language-learning app that turns lessons into short, gamified exercises across dozens of languages. It targets casual learners who benefit from bite-sized practice, streaks, and playful motivation.

Its interface is one of the most-studied examples of gamification: progress paths, XP, leagues, streak counters, and the expressive Duo mascot drive habit formation. Bright, rounded illustration, friendly typography, and tightly crafted lesson and reward animations make the experience feel encouraging rather than academic, with onboarding and retention flows widely cited as benchmarks.