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
I really like the app, but the ad close button is not working.I cannot dismiss ads on both iPhone and iPad, and it forces me to restart the app. とても良いアプリだと思っていますが、広告の閉じるボタンが機能しません。iPhoneとiPadの両方で発生しており、広告を閉じることができずアプリを再起動する必要があります。
Developer Response
Sorry for the inconvenience. Could you please try again and check whether the issue happens again? If it does, please contact us through the in-app Inquiry form and tell us your device model (for example, iPhone X or iPhone 15).
Add CEFR to more than English learners!
Corlew0
App is mainly only geared towards English learners. Most of the good features that would draw interest aren’t available for any other languages. The CEFR tracking is a powerful feature that drew me to this app; mainly because I want Spanish and French CEFR certifications in the future. This would have helped tremendously towards my goals. This feature should at least be available for Spanish learners being that Spanish is in the top 3 most learned languages in the world.
Developer Response
Thanks for the feedback! We agree—CEFR support for Spanish and French is important. We're planning to expand it in the future!
Excellent Language App
Kfvg65
I have many language apps. They all seem to do word to word translations. This is the only app I found with tips so your phraseologysound authentic. It is the app I have been looking for.
Developer Response
Thank you so much! We're glad the app helps you speak more naturally. Your feedback truly motivates us!
Features
Alice Quiz
I like that this journal gives prompts and corrections, which is what I was looking for in an app to improve my writing and grammar in Spanish. However, I can’t find the teams or CEFR analysis functions, which I think would be very helpful with this additional feedback and community.
Developer Response
Currently, CEFR is only supported for English. As for the teams, we support German, English, and Korean. We plan to gradually add support for more languages, so we kindly ask for your patience in the meantime.
- Home comments now load faster and more reliably.
- Improved the quality of AI feedback in several learning features.
Version 7.2.11
The developer, Daiki Sato, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
Identifiers
Data Linked to You
The following data may be collected and linked to your identity:
Purchases
Location
Contact Info
User Content
Search History
Identifiers
Usage Data
Diagnostics
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
Daiki Sato
Size
80.2 MB
Category
Education
Compatibility
Requires iOS 15.1 or later.
iPhone Requires iOS 15.1 or later.
iPad Requires iPadOS 15.1 or later.
iPod touch Requires iOS 15.1 or later.
Mac Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
