Learning

The Project

I couldn't find the perfect app to learn vocabulary and programming concepts effectively without hitting a paywall or dealing with bloated interfaces. So, I decided to build my own. Buzzcut Learning is a custom Progressive Web App (PWA) based on the Leitner System, designed to run entirely offline on any device.

The Leitner Algorithm

At the core of the app is a time-based spaced repetition algorithm. Cards are scheduled based on retention success. When you answer correctly, the card moves to the next "box" and its next review date is delayed (0 days, 1 day, 3 days, 1 week, 2 weeks). If you fail, the card immediately resets to Box 1 to be reviewed again.

Key Features & Technical Specs

• Progressive Web App (PWA): Fully installable on iOS (Add to Home Screen) and Android. Uses a Service Worker to cache assets and run 100% offline.
• Custom Decks: Ability to categorize flashcards into custom folders dynamically (e.g., English, C++, Embedded Systems).
• Frictionless Data Sync: To solve the LocalStorage isolation between PC and mobile without needing a heavy backend, I implemented a fast JSON export/import system to transfer decks seamlessly.
• Vanilla Architecture: Built entirely with pure HTML, CSS, and JavaScript. No heavy frameworks, ensuring blazing fast load times and minimal battery consumption.

Conclusion

This project allowed me to dive deep into browser-level APIs (Service Workers, LocalStorage, File API) while building a tool that I personally use every day for my studies and language learning.