Language-learning app Duolingo makes around $500 million annually, despite offering all of its lessons for free. WSJ explores ...

The Duolingo English Test (DET) has revealed its patent-pending ear scan technology that uses the DET’s mobile app to detect ...

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Learning a language is hard, that's why Duolingo is now using a tool called Expurrimenter to help boost user retention by trying out different messaging techniques in-app and in notifications.

In recent months, Duolingo has eased subscription friction and reduced paywalls while expanding AI-driven features and deepening its language courses, even as it targets 100 million daily active users ...

Learn what Duolingo is, how it works, and whether this popular language app is right for beginners and casual learners.

Duolingo’s growth story as subscription engagement, AI features, advertising mix, and cost discipline shape its market ...