Language Diary: LangJournal

LangJournal is a Japanese writing practice app that helps you learn by keeping a diary.
Write about your day in Japanese, get AI corrections, understand why each correction was made, and ask questions when you need help.
By turning your own thoughts and daily life into Japanese practice, you can build a habit that feels personal, practical, and easy to stick with.

[Key Features]

■ Write Japanese with AI corrections
Write a short diary entry in Japanese and get instant AI feedback.
LangJournal checks grammar, wording, vocabulary choices, and natural phrasing so you can improve your writing step by step.

■ Understand every correction
Corrections come with explanations, not just rewritten sentences.
You can see what changed and why, helping you avoid the same mistakes next time.

■ Ask AI when you’re stuck
After your diary is corrected, ask follow-up questions about grammar, nuance, word choice, or more natural expressions.
Learn from your own sentences, not generic examples.

■ Review mistakes with quick quizzes
Turn your corrected diary entries into quick review quizzes.
Practice the points you missed and build stronger habits through small, focused review.

■ Track your weekly progress
Review your writing activity, AI chats, the words you used, and learning progress each week.
Seeing your progress helps you stay consistent and understand how your Japanese writing is improving.

■ Practice Japanese with AI chat
Chat with AI characters by text or voice.
Use topics from your diary, or talk about anything you like, to practice Japanese in a more interactive way.

■ Also supports 10+ languages
In addition to Japanese, LangJournal supports English, Korean, Chinese, Spanish, German, French, Portuguese, Dutch, Italian, Polish, Swedish, and Tagalog.
You can keep practicing in one app as your language goals grow.

■ Zena keeps you motivated
Zena supports your daily learning with encouraging comments based on your activity.
Even a short diary entry can become a small step toward improving your Japanese.

[Recommended For]

• People who want to practice writing Japanese every day
• Learners who want AI corrections and grammar explanations
• People who want to understand why their Japanese sounds unnatural
• Learners who want to ask questions about their own sentences
• People who want to build a simple and sustainable language learning habit

Recent changes:
- You can now keep using the app while diary review exercises are being generated.
- Improved advanced feedback in translation challenges.
- Fixed weekly correction and exercise allowances to follow your time zone.
- Fixed the Home streak display when returning to the app on a new day.