# RevenueCat Documentation — Playbooks > Paywall strategy guides: freemium and hard. Part of the RevenueCat documentation for building in-app purchases and subscriptions. Each link below points to the Markdown version of a page in this section. For every other section, see the root index at [llms.txt](https://www.revenuecat.com/docs/llms.txt). For the complete documentation as a single Markdown file, see [llms-full.txt](https://www.revenuecat.com/docs/llms-full.txt). ## Playbooks - [Freemium Paywalls](https://www.revenuecat.com/docs/playbooks/guides/freemium.md) - [Hard Paywalls](https://www.revenuecat.com/docs/playbooks/guides/hard-paywall.md) - [Playbooks](https://www.revenuecat.com/docs/playbooks/overview.md)