NICHIJO - One Line a Day

One sentence a day, in the language you're learning. A thoughtful AI gently corrects, translates, and helps you build vocabulary from your own writing.

One line a day, in the language you're learning.

NICHIJO is a daily journaling app for language learners. Write one sentence about your day — in Japanese, English, Spanish, French, Korean, or Chinese — and a thoughtful AI will gently correct your grammar, suggest more natural phrasing, translate, and surface useful vocabulary for you to remember.

It's small on purpose.

The hardest part of learning a language isn't grammar — it's showing up. NICHIJO is built around the idea that one honest sentence a day, written in the language you actually want to live in, beats an hour of drilling once a week.

What you get

• AI feedback on every entry — corrections, natural rewrites, and translations
• Vocabulary cards saved automatically from your own writing
• Spaced repetition review and quick quizzes to make new words stick
• Six languages: Japanese, English, Spanish, French, Korean, Chinese
• A calm, distraction-free writing space — no streaks, no shame, no noise

Free, with subscriptions

The free tier is fully usable and supported by occasional ads. Premium and Pro subscriptions unlock unlimited AI feedback, advanced vocabulary tools, and an ad-free experience.

Why NICHIJO

NICHIJO (日常) means "daily life" in Japanese. We believe a language isn't something you study — it's something you live in, one ordinary sentence at a time.

Write your everyday. In any language.

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