DEV3 Free App Development Cost Calculator — Source Code (React + Tailwind)

Source code of the DEV3 App Development Cost Calculator, a client-side estimator that turns platforms, features, design level, admin panel and team region into hours, a timeline and a cost range.

Free download: sign in to any DEV3 account and click Download ZIP. Try it live: https://dev3.tech/tools/app-development-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

• Weighted effort model with low, likely and high ranges
• Per-area breakdown table with hours and cost
• Feature catalogue you can extend
• Optional PDF summary built in the browser

Tech stack

React 19, TypeScript, Vite, Tailwind CSS 4, jspdf.

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.
• The output is a planning estimate, not a quote; tune the weights to your own delivery history.