Japanese learners always struggle in the beginning — not with vocabulary, but with memorising Hiragana and Katakana properly. I was in the same situation once, and I didn’t find a clean offline tool on Android. Most apps were full of ads or heavy UI.
So I built a simple solution: KF Hiragana Katakana Flashcard — made for beginners and JLPT aspirants who just want to master the Japanese alphabet with repetition.
What the App Does (Main Features)
The goal is speed + focus. No distractions.
- 📌 Flashcards for all Hiragana & Katakana characters
- 🔄 Shuffle mode to improve recall
- 📱 Offline support — learn anywhere
- 🎯 Minimal UI to keep focus on learning
- 🚀 Designed for JLPT N5 and N4 level practice
This app is meant for daily usage, even if you study just 5–10 minutes per day.
Tech Stack & Development Flow
| Technology | Purpose |
|---|---|
| React Native | Core app development |
| Expo (Managed Workflow) | Dev environment & OTA updates |
| Local JSON Data | Store Hiragana & Katakana characters |
| Async Storage | Save user preferences (optional) |
| No Backend Used | Lightweight & offline-first approach |
| AI Tools (assisted) | Debugging & UI improvements |
| Expo EAS Build | Deployment to Play Store |
Keeping everything local made the app light and fast, perfect for learners who don’t have reliable internet all the time.
Download & Try Hiragana Katakana Flashcard 👉 Play Store
Lessons Learned During Development
What really helped me while building:
- Keeping UI minimal increased usability
- JSON-based data is clean & easy to maintain
- React Native + Expo is powerful for quick prototypes
- Testing on a real phone matters — simulator is not enough
- AI + human logic = faster problem solving
This app taught me that small tools solve big learning blocks. Especially in language learning.
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