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hktitan/duolingo

v2.0.0MIT

The Duolingo playbook as agent skills — retention, streaks, gamification, learning science, curriculum, efficacy measurement, metrics, experimentation, growth, brand, voice, culture, hiring, platform and mobile engineering, observability, and LLM feature design. Distilled from 750 posts on blog.duolingo.com plus the Duolingo Handbook and Design System. Start at the /duolingo router; design and UI craft routes out to design-engineering.

duo-freemium-monetization

Decide where the paid line sits when your free tier is also your distribution engine — what to charge for, what to never charge for, and when an upsell costs more than it earns. Covers friction-removal pricing versus core-value paywalls, metering a premium asset by dose instead of locking it, using subscribers to validate a feature before releasing it free, raising the ceiling for users who exhausted you, shared-seat plans without eligibility checks, renaming a tier without reading as a price increase, timing the ask to an intention the user already formed, and turning owned reference content into an instrumented conversion surface. Use when someone asks what should be free versus paid, how to design a paywall, why the upgrade screen is not converting, whether to ship a feature as premium first, how to price a family or team plan, or how to monetize without killing growth.

Version
2.0.0
License
MIT
Read SKILL.md at the source

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