Language Diary: LangJournal

Language Diary: LangJournal

AI Writing & Corrections

27 ratings
28 reviews
Free
In-App Purchases

Details

Released
April 25, 2023
Updated
November 2, 2026

Features

Language Diary: LangJournal screenshot #1 for iPhone
Language Diary: LangJournal screenshot #2 for iPhone
Language Diary: LangJournal screenshot #3 for iPhone
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Language Diary: LangJournal screenshot #5 for iPhone
Language Diary: LangJournal screenshot #6 for iPhone
Language Diary: LangJournal screenshot #7 for iPhone
Language Diary: LangJournal screenshot #8 for iPhone
Language Diary: LangJournal screenshot #9 for iPhone
Language Diary: LangJournal screenshot #10 for iPhone
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About

This app helps you learn a language by writing a diary. It provides AI-powered corrections, explanations, and follow-up questions to improve your writing and understanding. You can also chat with AI characters and track your progress with weekly reports and CEFR analysis.

✓AI diary corrections and explanations
✓Ask AI questions about your writing
✓Review mistakes with exercises
✓Weekly progress reports
✓CEFR level analysis
✓Chat with AI characters
✓Learn 13 languages
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+2

What's New in Language Diary

7.11.23

November 2, 2026

- Translation Practice now saves your answer before corrections finish and shows correction progress on the results screen. - Added a question during setup about how you heard about LangJournal. - Removed unnecessary blank space in diary editing, Ask AI, and AI Chat screens.

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Subscriptions & In-App Purchases

Premium Monthly Subscription

Premium Monthly Subscription

$4.991 Month
7 Days trial
Price Updates
November 3, 2026→$4.99
April 15, 2026→$7.99
July 5, 2024→$2.99
How to cancel Language Diary subscription ⁉️

User reviews

Great for developing natural writing!

I have been using this app most days and have found that my natural understanding of German grammar is improving. I learn new vocabulary from each response and really appreciate the explanations for each correction. Having the option to see my sentences rewritten in a more natural way is a bonus. Great app!
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添削が微妙です。

実際に使える英語なのに、まるで答えが一個しかないみたいな固定返答が多くて上から目線でイライラします。英語は"こういう言い回し表現もある"というのが個人で違うのが普通なんですよ?通じれば問題ないわけです。それを自然じゃない!間違ってる!という決めつけ添削はいただけないので、サブスク契約するのはやめました。実際にアメリカ人とLINEでやりとりしているタイプからするとこういうアプリはストレスが溜まる。

Response from developer

レビューありがとうございます。 添削が断定的で、押しつけがましく感じられるものになってしまい申し訳ありません。 ご指摘の通り、英語には通じる表現や言い回しの幅があります。 今後は、正解を押しつけるのではなく、表現の一例として伝えられるよう改善してまいります。

Ad close button not working

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。

Response from developer

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).

オススメされていれました。

知人からオススメされてほぼ毎日使っています。日記やチャットだけでなく、和文英訳も出来て嬉しいです。AIがすぐに添削してくれるため文法の間違いや単語のミスにすぐ気づくことが出来ます。
辞書があり、分からない単語があるとすぐに調べることができるのもありがたいです。
ですが今朝からなぜか添削ができなくなってしまい、確認するとチームのトーク履歴や、学習履歴が消えてしまいました。何もできません。悲しいです。

Response from developer

ご不便をおかけして申し訳ありません。 履歴が見えない・添削できない場合、ログイン状態の問題で発生することがあります。 お手数ですが、一度ログアウトして再ログインをお試しください。 改善しない場合は、確認しますのでご連絡ください。

習慣化に最適!

韓国語学習を始めて2年半、何度も日記にチャレンジしたけど習慣化出来なかった。
なのに、このアプリで習慣化成功!👏
アプリ内でチャッピーに添削してもらえる機能が本当にいい👍
初学の頃にこのアプリを見つけたかった。

Response from developer

レビューをお寄せいただき、ありがとうございます。コメント非常に励みになります。今後も学習を続けやすい体験を提供できるよう、改善を重ねてまいります。引き続きよろしくお願いいたします。

Developer apps

FAQ

What languages can I learn with LangJournal?

LangJournal supports learning in 13 languages, including English, Korean, Japanese, Chinese, Spanish, German, French, Italian, Portuguese, Dutch, Polish, Swedish, and Tagalog. This broad selection allows users to choose from many popular global languages for their studies.

How does LangJournal's AI help with corrections?

The AI in LangJournal checks your diary entries for grammar, vocabulary, and unnatural expressions. It not only corrects your writing but also provides explanations for each change, helping you understand why a correction is needed and how to improve your writing skills.

Can I ask the AI questions about my writing in LangJournal?

Yes, you can ask the AI any questions you have after receiving corrections. This feature allows you to explore nuances, grammar rules, alternative wording, and more natural ways to express yourself directly within the context of your diary entries.

Does LangJournal offer progress tracking?

LangJournal provides weekly reports that review your diary entries, AI chats, words used, and words used for the first time. It also tracks your practice days, helping you build a consistent learning habit and visualize your progress over time.

What are the subscription plans for LangJournal?

LangJournal offers several subscription plans, including Premium, Pro, and CEFR+ monthly and yearly options. Many plans come with a 7-day free trial, allowing you to test the premium features before committing to a purchase.

How does LangJournal's CEFR analysis work?

For English learners, LangJournal offers CEFR analysis of your diary entries. This feature provides an indication of your English proficiency by assessing vocabulary, grammar, and verb forms against CEFR levels, giving you an overall assessment.

Can I share my diary entries with others in LangJournal?

Yes, you can join a team to share your diary entries and exchange comments with other learners of the same language. This collaborative feature is currently available for English, German, and Korean learners, fostering a supportive learning community.

Is LangJournal suitable for beginners?

LangJournal is designed to help learners at various stages. It encourages starting with short sentences and gradually building grammar, vocabulary, and expressions, making it accessible for beginners while also offering advanced features for more experienced learners.