Eijournal

An English-journaling app for Japanese speakers learning English — free-form writing in Japanese and English, paired with AI-based corrections and score tracking over time.

Next.js
TypeScript
Supabase

Visit Eijournal

An Eijournal diary entry with AI corrections and a vocabulary table on desktop

Eijournal diary-writing screen on mobile

What it does

Write the same entry in Japanese and English side by side, then get AI corrections and a model translation.
Each entry is scored, and a trend chart tracks the score over time (daily / weekly / monthly).
Mistakes are automatically collected into a personal vocabulary notebook for later review.
A calendar view shows every past entry at a glance.

Screens

Eijournal dashboard with a recent-words list, score trend chart, and calendar — Dashboard — recent vocabulary, score trend, and a calendar of past entries.

An Eijournal diary entry with AI corrections highlighted and a vocabulary table — AI correction — mistakes highlighted, a model translation, and a vocabulary breakdown.

Eijournal diary-writing form on mobile with Japanese and English fields — Writing on mobile — Japanese and English side by side, plus a notes field.