What would I do if I were the PM for Duolingo?
FOCUS METRIC
7-Day Streak Retention
WHY THIS MATTERS
Duolingo's business model depends on daily active users. The 7-day streak is critical—users who maintain a 7-day streak have 3x higher long-term retention.
60% of new users drop off before completing day 7
Day 3 sees the biggest drop-off (25% of remaining users)
Users report feeling overwhelmed by too many features in onboarding
Streak pressure creates anxiety rather than motivation for beginners
HYPOTHESIS
New users fail to build the habit because the first week feels too hard, not because they lose interest in learning.
Interview 40 users who dropped off before day 7
Analyze session data: when do users struggle and quit within a lesson?
A/B test easier first-week difficulty vs current baseline
Survey power users: what kept them going in week 1?
Conduct user interviews with early drop-offs
Analyze behavioral data: exactly where in week 1 do users quit?
Test hypothesis: Is week 1 too hard, or are expectations misaligned?
Define success metric: Increase day-7 streak completion from X% to Y%
Build 'Easy Mode' first week: shorter lessons, more encouragement
Test 'Micro-wins' notifications: celebrate every small achievement
Prototype 'Flexible Streaks': Allow one 'freeze' in first week without losing progress
Run controlled experiment with 5,000 new users
Roll out winning variant to 20% of new users
Monitor day-7 completion rate vs control group
Gather feedback: Does 'Easy Mode' week 1 hurt long-term rigor?
Plan week 2-4 improvements based on learnings
Just as important as what to build is what NOT to build. These options might seem appealing but would distract from the core goal:
❌ AI tutor feature – Adds complexity, doesn't solve week 1 drop-off
❌ Social learning groups – Too much friction for new users
❌ Gamification overhaul – Risks breaking what already works
❌ New languages in week 1 – Confuses users, doesn't address retention
If week 1 feels achievable without compromising quality, predict 20-25% improvement in 7-day streak completion rate.