Most scheduling tools are built for professional meetings. Pinned is built for real life — dinner plans, coffee, training, family coordination. It adds a 📌 button to WhatsApp Web. Click it, pick a date and time, get reminded automatically. No account, no backend, no booking links. Everything runs locally in your browser. Per-contact memory, color-coded reminders, and browser notifications. WhatsApp Web first — Gmail and LinkedIn coming next.