XYZ - Free AI Speed Reading App

Private, local-first RSVP reading with optional semantic pacing from 50 to 2,000 WPM.

XYZ is a free, open-source speed reading application that runs entirely in your browser. No servers, no logins, no tracking—just you and your books.

✨ Features

• 🚀 RSVP Technology - Rapid Serial Visual Presentation displays words at a fixed point, eliminating eye movement
• 🧠 AI-Powered Pacing - Local LLM analyzes text complexity and adjusts speed automatically
• 🔒 100% Private - Everything runs in your browser. Your books never leave your device
• 📚 Multi-Format Support - Upload EPUB, PDF, Markdown, or TXT files from your library
• ⚡ 50-2000 WPM - Adjustable reading speed to match your comfort level
• 📱 Works Offline - Once loaded, works without internet connection
• 🔄 P2P Sync - Sync between devices via QR code (no cloud needed)

🎯 Why XYZ?

Traditional speed reading apps force you to process simple words like "hello" at the same speed as complex philosophical concepts. Your brain doesn't work that way.

XYZ uses a local AI model (running entirely in your browser via WebLLM) to analyze text density and automatically adjust pacing:

• Simple passages → Speed up
• Complex ideas → Slow down

This creates a natural reading rhythm that matches how your brain actually processes information.

🚀 Quick Start

1. Visit xyz.com
2. Upload a supported file: EPUB, PDF, Markdown, or TXT (or try the demo)
3. Start reading!

No installation, no account, no setup.

💻 Development

# Clone the repo
git clone https://github.com/arpheno/lalange.git
cd lalange

# Install dependencies
npm install

# Start dev server
npm run dev

# Optional: add TURN for networks that cannot establish a direct WebRTC path
VITE_WEBRTC_ICE_SERVERS='[{"urls":"turns:relay.example.com:5349","username":"app-user","credential":"app-password"}]' npm run dev

# Run tests
npm test -- --run

# Download a small deterministic Gutenberg EPUB corpus and run structure/TOC checks
npm run gutenberg:corpus -- --count=6 --seed=xyz-epub-corpus --clean

# Build for production
npm run build

Production releases are staged and promoted through GitHub Actions. See docs/deployment.md for the release flow and one-time Cloudflare setup.

🏗️ Tech Stack

• Frontend: React + TypeScript + Vite
• Styling: Tailwind CSS
• AI: WebLLM (local LLM inference via WebGPU)
• Storage: RxDB + IndexedDB (local-first)
• Sync: WebRTC (peer-to-peer through STUN, with optional TURN relay)

📖 Documentation

• Field Manual - How to use XYZ effectively
• Research - The theory behind neuro-semantic pacing
• Manifesto - Our philosophy on local-first AI

🤝 Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add some amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

📄 License

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

🙏 Acknowledgments

• WebLLM for enabling local LLM inference (embedded under Apache License 2.0)
• Project Gutenberg for free public domain books
• The open source community

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Made with ❤️ by Arphen

No logins. No tracking. Just reading.