Chunkbook: AI Phrasebook

Speak English Chinese Korean

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

Chunkbook turns the phrases you could not say in conversation and the foreign sentences you come across into "your own AI phrasebook" and keeps them in review until you can say them. ■ Adding phrases is easy Paste, speak or write. AI analyzes the sentence in about 10 seconds and creates a natural example sentence and the phrases worth remembering. Sentences you write yourself are corrected on the spot and your original text is kept. ■ Review quiz right before you forget Anki-style spaced repetition (SM-2) sets the next due date for every card. A few minutes a day is enough. ■ Instant Speaking gets it out of your mouth See the meaning and say it out loud within the time limit. Phrases you could not say come back until you can. AI checks your speech and records what you said and what you could not say. ■ Listen and shadow Play the translation and the target language back to back. Background playback is supported and you can control it from the lock screen, so your commute or chores become study time. ■ One question a day A question tailored to your phrasebook arrives once a day. What you could not say becomes study material and comes back a few days later. ■ 4 languages, 12 pairs Choose any pair from Japanese, English, Chinese and Korean. Switch phrasebooks and study several languages side by side. ■ Ready to use from day one Starter packs by genre (daily conversation, business, travel) let you start today. Anki decks (.apkg) and CSV files can be imported, and you can export from Chunkbook whenever you want to take your cards elsewhere. ■ Widgets and review reminders Home screen widgets show what is left today and your streak. You can also set the time of your review reminder. Chunkbook has two plans. The free plan keeps manual phrase entry and review quizzes unlimited, and one question a day always arrives. AI features on the free plan cover 10 sentence analyses, 10 Instant Speaking questions and 30 speech checks per month. If you want to study more, the Standard plan (¥780/month, tax included: 100 analyses, 100 Instant Speaking questions, 300 speech checks) is available. * Text on pages that require a login, or private social media posts, may not be available when importing through the share sheet. ■ Subscription details ・Name: Chunkbook Standard (auto-renewable subscription) ・Length and price: 1 month, JPY 780 (tax included) ・Auto-renewal: The subscription renews automatically unless it is canceled at least 24 hours before the end of the current period. Manage or cancel it in Settings > Apple ID > Subscriptions ・Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ・Chunkbook Terms of Service: https://chunkbook.net/legal/terms ・Privacy Policy: https://chunkbook.net/legal/privacy

Ratings & Reviews

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- Fixed extracted phrases not being underlined in red in Japanese Chinese and Korean books - Adjacent phrases are now easier to tell apart

Version 1.0.3

The developer, Ryuya Kawano, 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 Linked to You

    The following data may be collected and linked to your identity:

    • Purchases
    • Contact Info
    • User Content
    • Identifiers
    • Usage Data

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • 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
  • Ryuya Kawano
Size
  • 63 MB
Category
  • Education
Compatibility
Requires iOS 15.0 or later.
  • iPhone
    Requires iOS 15.0 or later.
  • iPod touch
    Requires iOS 15.0 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
Age Rating
4+
Copyright
  • © 2026 Ryuya Kawano
  • Developer Website
  • Privacy Policy

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