What problem does it solve? Free-to-paid conversion often stalls because paywalls appear at the wrong moment, hide value, or use friction-heavy upgrade flows. This Skill provides structured guidance for designing in-app paywalls, upgrade modals, and feature gates that convert users after they have experienced value. ## Core Features & Use Cases - Paywall Trigger Design: Defines when to show upgrade prompts across feature gates, usage limits, trial expirations, and time-based prompts, with frequency caps and cool-down rules. - Screen Component Templates: Provides copy and layout patterns for feature-lock, usage-limit, and trial-expiration paywalls, including headlines, pricing display, social proof, and escape hatches. - A/B Testing Playbook: Ships a references/experiments.md catalog of test ideas covering timing, pricing presentation, copy, trial structure, and personalization. - Use Case: A SaaS team notices low trial-to-paid conversion. Use this Skill to redesign the trial expiration screen with value summaries, early warnings, and a one-click upgrade path, then select experiments to validate the change. ## Quick Start Ask the AI to redesign your trial expiration paywall screen using the paywall-upgrade-cro skill, including headline, value recap, pricing, and CTA.