📦 Launch-Ready Freemium Chrome Extension Starter

Rebrand, publish, and sell Pro subscriptions via your Whop checkout (0% revenue share; Whop/processor fees apply).

User Features

Trial Reminders: Detects free trials on signup pages and opens a pre-filled Google Calendar reminder (1 day prior, or 2 days for trials ≥14 days).

Smart Detection: Defaults to 7 days if unstated (user-correctable). If local regex fails, sends up to 1,200 clean characters (emails/digits stripped; blocked on checkout/card pages) to Gemini AI.

Pro Perks: Cancellation-day browser notifications + 28 cancellation deep links (Netflix, Spotify, Adobe, ChatGPT) with search fallbacks.

Included Tech & Docs

Core Extension: Manifest V3, vanilla JS (no build step), popup with usage meter.

Freemium Engine: Configurable monthly free limits (default: 10) in config.js.

License Backend: Cloudflare Worker validates Whop keys server-side & binds to browser profiles. Rate-limited, fail-closed, outage-resistant.

Branding & Launch Kit: Centralized config.js and stamp-brand.mjs brand sync, setup README, Web Store permission justifications, privacy policy template, and test scripts.

Setup & License

Your Tasks: Deploy Worker (Cloudflare, Gemini & Whop API keys), create Whop product, host privacy policy, pay CWS fee ($5), and submit.

Terms: Non-exclusive commercial license to modify/publish under your name. Source resale or redistribution prohibited (LICENSE.md).