Duolingo·Article
How Duolingo reignited user growth
How Duolingo 6x'd DAUs through retention-focused strategy
Retention & Engagement
User retention, engagement loops, personalization
13 case studies
Duolingo·Podcast
Behind the product: Duolingo streaks
How streaks drove $14B growth through 600+ experiments
Netflix·Article
Netflix Personalization History
From DVD to streaming personalization and Netflix Prize
Netflix, Timehop·Article
Sustainable Product Growth
Netflix multi-act growth vs Timehop failure analysis