Lang Journal – Language Diary

AI correction Spanish & French

Free · In‑App Purchases · Designed for iPad

LangJournal is an app designed to help you develop language skills by keeping a diary. It supports English, Korean, Japanese, Chinese, French, German, Spanish, Portuguese, Dutch, Italian, Polish, Swedish, and Tagalog. An AI feature instantly reviews your diary for grammar, vocabulary, and syntax. There is also a feature for learning with friends in small teams of up to five members. You can join a team and exchange diaries and comments with people studying the same language. Keeping a foreign-language diary can be challenging on your own, but it becomes more manageable with supportive peers. Strengthening your writing skills makes LangJournal ideal for test preparation, including TOEFL. Feature Details: ■ Instant diary corrections powered by AI Your English compositions and diaries (and those in other languages) are corrected by AI. Three distinct AI engines are available, each offering unique correction styles. You can receive three different sets of correction results. Writing a diary and receiving immediate feedback helps improve your language skills. ■ Chat and Conversation with AI You can interact with the AI via text or voice, allowing you to practice language skills in a conversational format. ■ Share diaries and connect with peers in teams Form teams of up to five members, share diaries and comments with each other, and provide mutual encouragement among users learning the same language. Group study can boost continuation rates more than threefold compared to studying alone. ※Currently, this feature is available only for learners of English, Korean, or German. ■ Pose questions to ChatGPT You can directly ask ChatGPT questions about translations or expression improvements for practical learning support. This lets you receive instant feedback and effectively enhance your language skills. ■ Evaluate your journal entries with CEFR levels Your diary is analyzed for vocabulary, grammar, and verb usage, then rated on a six-level CEFR scale from A1 to C2. ※Currently, this feature is available only for learners of English. ■ Attach images or videos to entries You can attach up to four photos or videos per diary entry. Pairing images with your text makes revisiting your diary entries more enjoyable. ■ Record and verify pronunciation with voice recordings After writing your diary, you can record your voice and save it in the app, helping you check your pronunciation. Reading aloud strengthens memory retention and aids in real-life conversations. ■ Translation You can translate your diary entries. Verifying how naturally they read in your native language can further aid your language learning process. ■ Multiple diaries a day You can write as many entries as you wish, and each one will be corrected by AI. ■ Passcode Lock If you prefer privacy, lock the app with a passcode. Face ID and Touch ID are also supported. ■ Reminder Function Research indicates that continuing for over 21 days makes it easier to maintain the habit. Studies also suggest that setting a fixed daily writing time further aids habit formation. Languages Available for Learning: ・English ・Korean ・Japanese ・Chinese ・Spanish ・German ・French ・Portuguese ・Dutch ・Italian ・Polish ・Swedish ・Tagalog For those serious about studying languages Writing is incredibly important for language learning—you can’t speak what you can’t write. Writing also reinforces speaking skills. Content from your diary can be used in daily conversations.

  • 4.3
    out of 5
    18 Ratings

Made small UI improvements to enhance usability.

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

The developer has not yet indicated which accessibility features this app supports. Learn More

  • Seller
    • Daiki Sato
  • Size
    • 76.9 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.
    • Apple Vision
      Requires visionOS 1.0 or later.
  • Languages
    English and 2 more
    • English, Japanese, Korean
  • Age Rating
    4+
  • In-App Purchases
    Yes
    • Premium Monthly Subscription $2.99
    • Premium Yearly Subscription $34.99
    • Pro Yearly Subscription $59.99
    • Pro Monthly Subscription $5.99
  • Copyright
    • © 2025 LANGJOURNAL