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How Duolingo Gamified Language Learning to Build a Habit

Lucas and Luna explore how Duolingo turned language learning into a daily habit using game mechanics, streaks, and notifications. They break down the psychology behind the green owl's relentless engagement, the controversial revenue model of ads versus subscriptions, and how the company went public with a mission-driven pitch. Specific numbers: 500 million downloads, $250 million in annualized bookings pre-IPO, and a 3.1x improvement in daily active users per cohort after introducing the streak feature. A deep dive into product-led growth and behavioral design without the hype.

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