Live on Firefox Add-ons · WhatsApp Web

Turn messages
into plans.

Pinned adds a 📌 button to WhatsApp Web. Pick a date, get reminded — without leaving the chat.

Install for Firefox — it's free No account. No backend. Runs locally in your browser.

How it looks in WhatsApp Web

See it in action

15 seconds. That's the whole flow.

Recorded live on WhatsApp Web with the Pinned Firefox extension

Planning is still
weirdly annoying.

“Does Tuesday work?” “Maybe Thursday?” “I’ll check and get back to you.” Pinned exists to kill that tiny but constant friction.

Before Pinned

Back-and-forth messages, forgotten plans, vague maybe-times, screenshots, and mental overhead for something that should take five seconds.

With Pinned

Click 📌, choose the time, keep going with the conversation. The plan lives where the conversation already happened.

How it works

The whole point is that you don't leave the chat.

01
📌

Click the pin button

A floating 📌 button appears in WhatsApp Web. Tap it and a calendar opens — right there.

02
📅

Pick a date and time

Choose the date, set a time. No booking links, no external pages, no copy-pasting.

03
🧠

Saved per contact

Sara's plans stay with Sara. Multiple appointments per conversation, all remembered locally.

04
🔔

Get reminded

The button turns yellow when a plan is coming up, red when it's close. Notifications fire 1 hour before.

Why not Calendly

Different tools for different moments.

Calendly is great for professional scheduling. Pinned is for the casual, human side of planning.

Calendly is built for

  • Professional meetings and external booking
  • Structured availability pages and forms
  • Sales, recruiting, enterprise workflows
  • People who don't know each other yet

Pinned is built for

  • Planning inside the actual conversation
  • Friends, family, group chats, casual coordination
  • Zero account, zero friction, low overhead
  • Plans too informal for a booking link

What exists today

A real MVP — honest about what it is.

Firefox extension ✓ Live on Firefox Add-ons
WhatsApp Web ✓ Working today
Per-contact memory ✓ Local storage
Push notifications ✓ Browser notifications
Chrome extension Coming soon
Google Calendar sync Planned
Gmail + LinkedIn Later
Mobile Later