From Dorm Room to a MILLION Users in 24 Hours — The YouLearn Story with David Yu

What happens when a college student builds an AI tool that goes viral overnight — and changes how thousands of students study? Summary: In this episode of Lobster Talks, Gabriel sits down with David Yu, co-founder of YouLearn — the YC-backed AI tutor that transforms PDFs, class recordings, and YouTube videos into quizzes, notes, and a personal tutor. From a dorm-room side project to a viral social growth engine, this episode is packed with tactics, conviction, and bold bets on the future of learning. You’ll learn: How YouLearn hit 10,000 users in 24 hours from a single post The exact tactics they used to blow up on Instagram and TikTok Why most AI tools in education fail — and how YouLearn avoids it The truth about retention, virality, and real product usage How David thinks about AI hallucinations and data safety What learning could look like in 2030 with Neuralink, glasses, and beyond 📌 Watch now and subscribe for more smart, fast, founder-first interviews. Chapters: 00:00 Viral Launch on Social Media 00:20 Introduction to YouLearn 00:47 Meet the Founder: David Yu 01:09 The Birth of YouLearn 02:37 Early Challenges and Successes 05:09 Going Viral Again 05:45 Handling Rapid Growth 08:14 Maintaining Motivation 10:53 The Importance of Co-Founders 12:00 Transition to Full-Time 15:30 Iterating on the Product 18:36 Joining Y Combinator 21:04 Investor Skepticism Towards YC 21:49 Misconceptions About Joining YC 22:33 Right and Wrong Reasons to Join YC 23:28 Maximizing YC Experience 25:08 Navigating YC with Existing Revenue 30:26 AI's Role in Education 31:48 Future of Learning with AI 34:05 Misconceptions About AI in Learning 35:10 The Evolution of Learning Tools 40:26 Final Thoughts and Future Prospects 🎧 Listen on the go: Spotify: https://spoti.fi/4m2K7ah Apple: https://apple.co/4cZ8RMm My other YouTube Channel: https://www.youtube.com/@GJarrosson