Duolingo is a language learning app for the general public, positioned alongside online language courses and vocabulary tools. Its gamified courses cover 40+ languages, with listening, speaking, reading, and writing practice, leaderboards, and streak mechanics. It supports iOS, Android, and Web, and uses a freemium model with a Super subscription to remove ads.

Duolingo is an officially hosted product, with no self-hosted deployment or server resource requirements. The entry requirement is to install the app or access the Web version.

Users in China should pay attention to access stability, payments, notifications, and separately confirm compatibility with the WeChat ecosystem and domestic service providers.