CatBook: E-Ink Reader
Eye-friendly E-Ink reader
$0.29 · In‑App Purchases · Designed for iPad. Not verified for macOS.
Read PDFs, text and comics on a calm, paper-like E-Ink screen. Rumor has it the shelf cats are planning something… See you soon, cat butler.
CatBook is an e-book reader that shows PDFs, text and comics on a calm, eye-friendly E-Ink style screen. Pixel cats live on your bookshelf.
■ Easy on the eyes
• Turns the screen into black ink on paper to cut glare
• Three papers: Classic (warm off-white), High-contrast, and Night dark
• Adjust paper grain, ink contrast and warm paper tone (less blue light)
• Optional refresh flash on page turns, and lower brightness when the app opens
■ Pages that turn like a book
• Realistic page curl
• Text is split into pages that fit the screen exactly, with no scrolling
• Font size and layout settings
• Remembers where you stopped, plus bookmarks
■ Comics and scans, too
• Open ZIP/CBZ comics directly, without unzipping
• Image folders, JPG, PNG, WEBP, HEIC and animated GIF
• Pinch to zoom, automatic split of two-page scans, right-to-left reading, and margin-free fit
■ Easy import
• Import from the Files app
• Pick files from Google Drive (CatBook only sees the files you choose)
• Old Korean text files (EUC-KR) are detected automatically, so nothing turns into garbled text
■ Cat friends on your shelf
• Pixel cats walk across your books, hide and take naps
• 11 breeds. Adopt new cats with coins (optional in-app purchase)
■ Privacy
• No sign-up, no ads, no tracking. CatBook collects no personal data.
Languages: English, 한국어, 日本語, 简体中文, 繁體中文, Español
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, SUNGJAE KIM, 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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- SUNGJAE KIM
- Size
- 2.8 MB
- Category
- Books
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
English and 5 more
- English, Japanese, Korean, Simplified Chinese, Spanish, Traditional Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Coin Pouch $1.99
- Coin Treasure Chest $3.99
- Handful of Coins $0.49
- Copyright
- © 2026 SUNGJAE KIM