DEV3 Free Meeting Planner and Cost Calculator — Source Code (React + Tailwind)

Source code of the DEV3 Meeting Planner and Cost Calculator, a time zone meeting planner with a working-hours overlap grid for up to six cities, plus a meeting cost calculator.

Free download: sign in to any DEV3 account and click Download ZIP. Try it live: https://dev3.tech/tools/meeting-planner-cost-calculator shows the finished tool running.

What is in the download

• A standalone Vite + React + TypeScript + Tailwind CSS project: src/tool holds the tool, shared pieces sit beside it
• package.json with exact versions plus a lockfile, so npm ci works
• README.md (run, build, embed in Next.js or plain React) and an MIT LICENSE

What the code does

• Overlap grid built from the browser Intl time zone database, DST aware
• Best-hour suggestion and runs where everyone is in working hours
• Any IANA zone can be added
• Cost per meeting, month and year by attendee group

Tech stack

React 19, TypeScript, Vite, Tailwind CSS 4.

Install and customise

The How to install and How to use tabs list the steps. In short: unzip, npm ci, npm run dev, then copy the tool folder into your own app if you want to embed it.

Good to know

• A browser-only tool: there is no backend or database in the code.