LangBook
KOSUKE NAKASONO Education iPhoneiPadiPod touch
LangBook is a free Education app for iPhone and iPad by KOSUKE NAKASONO. Requires iOS 17.0. Updated April 30, 2026.
- Price
- Free
- on the App Store
- Size
- 21 MB
- Age 12+
- Updated
- Apr 30
- 2026 · v2.0
Screenshots
About LangBook
Build your Japanese writing habit, one sentence at a time. This app helps you practice Japanese through daily journaling, AI feedback, vocabulary review, and flashcards. Write about your feelings, your day, or a guided topic, then receive feedback on grammar, vocabulary, expression, and natural flow. It is designed for learners who want to write more Japanese, build confidence, and make Japanese study part of their daily routine. ■ Japanese journal Write freely about your day or choose a guided topic when you are not sure what to write. Start small with just one sentence a day. ■ AI feedback Get clear feedback on grammar, vocabulary, expression, and natural flow. The AI helps you make your Japanese sound more natural and easier to understand. ■ Track your progress See your score, study streak, learning time, and skill balance. Visual progress helps you stay motivated. ■ Vocabulary and flashcards Save important words and review them with flashcards. Practice forgotten words and turn them into usable vocabulary. ■ Recommended for: ・Learners who want to write a Japanese diary ・Students who want to improve Japanese writing ・People looking for AI Japanese correction ・Learners who want to practice Japanese grammar and vocabulary ・Anyone who wants to study Japanese every day ・Students who want to review words with flashcards One sentence a day can become tomorrow’s confidence. Start writing in Japanese today. Some AI features require a subscription. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://privacyenglsih.bridra.net
What’s new
Version 2.0 · Updated April 30, 2026
We've revamped the UI. Spanish language support has been added.
App privacy
The developer, KOSUKE NAKASONO, reported these privacy practices to Apple.
Data Linked to You
The following data, which may be collected and linked to your identity, may be used for the following purposes:
- Purchases: Purchase History
- User Content: Other User Content
- Identifiers: User ID
Used for: App Functionality
Alternatives to LangBook
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PrépaGo Japanese
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Flashcards & Game: Word Pocket
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| LangBook | – | Free | April 30, 2026 | |
| PrépaGo Japanese | – | Free | Apr 16, 2026 | Compare |
| Epico - Japanese with Manga | – | Free | Mar 30, 2026 | Compare |
| Uptie(アップティー) - 英作文と英語添削 | – | Free | Aug 1, 2026 | Compare |
| Easy Japanese - Tokyo Accent | – | Free | Sep 23, 2026 | Compare |
| Hanasu - Speak Japanese | – | Free | Mar 30, 2026 | Compare |
| Flashcards & Game: Word Pocket | – | Free | Sep 9, 2026 | Compare |
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