License: AGPL-3.0 Website Next.js TypeScript

Open Source Cognitive Training Collection

A curated collection of brain training games, with a primary focus on attention and concentration improvement. Built from the ground up using Next.js 15, TypeScript, and Tailwind CSS, featuring transparent implementations of scientific cognitive paradigms.

Experience the full-featured, optimized version of these games on our official website.

This repository contains the source code for FreeFocusGames.com, a collection of cognitive exercises designed to improve:

• Working Memory
• Attention Span
• Processing Speed
• Cognitive Flexibility

Unlike many proprietary brain training apps, this project provides transparent, scientific implementations of classic cognitive psychology paradigms.

This repository features production-ready implementations of the following cognitive tasks:

The gold standard for working memory training. Based on the research by Susanne Jaeggi, this task requires users to simultaneously track visual and auditory stimuli sequences.

• Keywords: Fluid Intelligence, Working Memory, Jaime Jaeggi, N-Back Algorithm

A grid of randomly distributed numbers used for speed reading development and peripheral vision training.

• Keywords: Speed Reading, Attention Control, Peripheral Vision, Focus Grid

A neuropsychological test demonstrating the reaction time delay between congruent and incongruent stimuli. Measures cognitive flexibility and executive function.

• Keywords: Selective Attention, Cognitive Flexibility, Executive Function, Inhibition Control

A millisecond-precision test to measure your reaction speed. Click as fast as you can when the screen changes color. Widely used in sports science and cognitive research.

• Keywords: Reaction Time, Reflex Test, Speed Test, Response Time, Human Benchmark

• Pomodoro Timer: Focus timer based on the Pomodoro Technique.
• Block Memory Challenge: Spatial working memory exercise.

• Framework: Next.js 15 (App Directory)
• Language: TypeScript
• Styling: Tailwind CSS
• UI Components: Radix UI & Shadcn/ui
• Animations: Framer Motion & Canvas Confetti
• Internationalization: next-intl

To run this project locally for development or educational purposes:

# 1. Clone the repository
git clone https://github.com/loethen/freefocusgames.git
# 2. Install dependencies
npm install
# or
yarn install
# 3. Run the development server
npm run dev

Open http://localhost:3000 with your browser to see the result.

This project is licensed under the AGPL-3.0 License - see the LICENSE file for details.

• ✅ Free to use for personal/educational purposes.
• ✅ Free to fork and modify (changes must be open-sourced).
• ❌ Cannot be used in closed-source proprietary software.

Built with ❤️ for the cognitive science community.