Math Practice App

A gamified mental-math trainer for kids. I built it so my daughter could practice addition, subtraction, multiplication and division in short sessions with instant feedback, levels and a progress history.

▶ Live demo: math-app-psi.vercel.app

Features

• Four operations, each with its own rules: sums up to 10,000, subtractions that never go negative, multiplication tables 1–10, and divisions that always have an integer result.
• Configurable ranges and difficulty (easy, medium, hard), so the problems grow with the child.
• Four answer options per problem; distractors are close to the right answer, so guessing doesn't pay off.
• Levels and progress: correct answers unlock the next level, with time tracked per level.
• History of correct and wrong answers and total study time, saved in the browser (localStorage, no account or backend).
• Keyboard-first: keys 1–4 pick an operation and answer, so practice flows without the mouse.
• Light/dark mode and fully responsive, from phone to desktop.

Stack

Next.js 15 (App Router) · React 19 · TypeScript · Tailwind CSS · deployed on Vercel.

Running locally

git clone https://github.com/gbflores/math-app.git
cd math-app
npm install
npm run dev        # http://localhost:3000

Production build: npm run build && npm run start.

License

MIT © Guilherme Flores