
Growth Engine · Track 1
Synth-Pop / Indie Electropop · Urgent, anthemic, playful
Jorge Mazal · How Duolingo reignited user growth
“Streaks is the most impactful feature. We have over 9 million users with a year-plus streak.”- Jackson Shuttleworth
Duolingo was the biggest language app in the world but growth went flat. They tried gamification and referrals, but both failed. Then they discovered that focusing on current user retention had 5x the impact. The streak mechanic became their flywheel, turning daily returns into deepening commitment. DAU grew 4.5x.