CodeProof

CodeProof is a mobile + web app that stops the endless copy-paste roulette of promo codes. It collects user-submitted codes, but every code must be “proven” by attaching an anonymized checkout confirmation (total, discount line, timestamp, store domain) or a screen recording snippet. The app then assigns a freshness score, success rate by device/browser, and flags common failure reasons (new customers only, subscription required, excluded items). Users can search by store, category, or cart value and see the best code ranked by real-world success probability. A lightweight browser extension can auto-test the top 2–3 verified codes at checkout (with user consent) and report outcomes back to the community. Monetization is realistic: affiliate links where allowed, plus a small subscription for power users who want auto-testing and price-drop alerts.