LangJournal

LangJournal is a language learning app that helps you build real writing skills by keeping a diary and getting AI correction.

Write in French, Japanese, Korean, Chinese, Spanish, German, Portuguese, Dutch, Italian, Tagalog, English, and more. The AI checks your diary entries for grammar, vocabulary, and natural phrasing, then helps you improve your writing step by step.

By writing regularly, you can practice expressing your thoughts in the language you are learning and build a daily habit that feels practical and sustainable.

LangJournal is useful for daily writing practice, language study, and improving how naturally you express yourself in your target language.

[Key Features]

■ Instant AI Correction

Get instant feedback on your diary entries.

The AI checks not only grammar mistakes, but also unnatural wording, vocabulary choices, and expressions, so you can improve your practical writing skills.

■ Chat and Talk with AI

Chat with AI by text or voice.

You can ask follow-up questions about your diary, explore better ways to say something, and deepen your learning through conversation.

■ Learn with Others Through Teams

Join a team and share diary entries with other learners.

You can comment on each other’s writing and stay motivated together.

*Currently available for learners of English, Korean, and German.

■ Ask ChatGPT

Ask questions about translations, wording differences, or more natural expressions.

This is helpful for reviewing your diary entries and understanding corrections more deeply.

■ CEFR Level Check

Analyze your diary entries by vocabulary, grammar, verb usage, and more, and check your level using CEFR (A1–C2).

*Currently available for English learners.

■ Add Photos and Videos

Attach up to 4 photos or videos to each diary entry.

Keep your memories together with your writing practice.

■ Voice Recording for Speaking Practice

Record and save your voice after writing a diary entry.

This helps with pronunciation practice, reading aloud, and speaking improvement.

■ Translation Support

Translate your diary entries and compare them with your original writing.

This helps you better understand what you wrote and how your ideas are expressed.

■ Write as Much as You Want

There is no limit to the number of diary entries you can write.

Practice as often as you like and increase your output over time.

■ Passcode Lock

Protect your diary with a passcode.

Face ID and Touch ID are also supported on compatible devices.

■ Reminder Notifications

Set your study time and get reminder notifications.

This helps you build a daily writing habit.

■ Use Across Multiple Devices

Register with your email address and password to use the same account on multiple devices.

You can continue using the app even after changing devices.

■ Text-to-Speech

Listen to your diary entries with text-to-speech.

This is useful for pronunciation checks and reading practice.

■ Search Past Entries

Find your past diary entries quickly with keyword search.

■ Font Customization

Change the font size and style to make writing more comfortable for you.

[Languages You Can Learn]

• English

• Korean

• Japanese

• Chinese

• Spanish

• German

• French

• Portuguese

• Dutch

• Italian

• Polish

• Swedish

• Tagalog

[Recommended For]

• People who want to improve writing through daily diary practice

• Learners who want AI correction for more natural expressions

• People who want to build a sustainable language learning habit

• Learners who want to practice writing in French, Japanese, Korean, and other languages

• People who want to review their writing and ask follow-up questions with AI