Interactive Japanese Kana (Hiragana & Katakana) learning PWA with charts, quizzes, tools, and analytics.
- Kana Chart — Browse all gojuon, dakuten, handakuten, and yoon kana with hiragana, katakana, and comparison display modes
- Quiz — Weighted quiz engine that prioritizes frequently-missed kana, with keyboard shortcuts and auto-advance
- Learn — Infinite scroll kana feed with streak milestones and embedded pop quizzes
- Tools — Japanese study utilities including weekday/month references, date and number conversion, counters, and kana handwriting identification
- Analytics — GitHub-style contribution heatmap, line charts, streak counters, and average scores
- PWA — Installable, works offline with service worker caching
- i18n — English, Japanese, Simplified Chinese, Traditional Chinese
- Theming — Light/dark/auto with 8 color scheme palettes
| Kana Chart | Learn | Quiz | Tools | Tools | Settings |
|---|---|---|---|---|---|
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bun install
bun devThe dev server starts on http://localhost:3000.
| Command | Description |
|---|---|
bun dev |
Start dev server on port 3000 |
bun run build |
Production build (outputs to dist/) |
bun run preview |
Preview production build |
bun run test |
Run tests with Vitest |
bun run check |
Run Biome lint + format check |
bun run lint |
Lint only |
bun run format |
Format only |
MIT License