Define and enforce pricing plan limits in your Rails SaaS (entitlements, quotas, feature gating). pricing_plans acts as your single source of truth for pricing plans. Define a pricing catalog with feature gating, persistent caps, per‑period allowances, grace periods, and get view/controller/model helpers. Seamless Stripe/Pay ergonomics and UI‑agnostic helpers to build pricing tables, plan usage meters, plan limit alerts, upgrade prompts, and more.