What problem does it solve? Free users often never convert because upgrade prompts appear at the wrong moment, hide the value of paid features, or create friction that erodes trust. This Skill provides structured guidance for designing in-app paywalls and upgrade flows that convert users after they have experienced real value. ## Core Features & Use Cases - Paywall Trigger Design: Defines when to show upgrade prompts (feature gates, usage limits, trial expiration, time-based) and when not to, with frequency and cool-down rules. - Screen Component Blueprints: Provides ready-made layouts for feature-lock, usage-limit, and trial-expiration paywalls, covering headline, value demonstration, pricing, social proof, CTA, and escape hatch. - A/B Testing & Metrics: Lists what to test (timing, copy, pricing presentation) and which metrics to track (impression rate, click-through, completion, revenue per user). - Use Case: A marketplace app wants to convert free shop owners to a paid tier. Use this Skill to design a usage-limit paywall that shows what upgrading unlocks, respects the "no", and includes an experiment plan. ## Quick Start Ask the assistant to design an upgrade screen for users who hit the free plan limit, including headline, feature comparison, pricing, and a dismiss option.