Viewer DUO
Page-curl book & comic reader
$2.99 · Designed for iPad. Not verified for macOS.
Pages that really curl. Read in a two-page spread.
The feel of turning real paper, on your screen.
Viewer DUO simulates every page as a physical sheet. Pull an edge and the paper lifts, the back shows through faintly, and a shadow falls on the page beneath. Let go and it settles at a natural speed.
On iPad and landscape iPhone the book opens as a two-page spread, just like print. On iPhone Duo the hinge becomes the spine.
• Formats — PDF / EPUB / TXT / ZIP・CBZ / RAR・CBR
• Turning — drag to follow your finger, tap an edge to turn, pinch a corner for a diagonal curl
• Spread / single page — automatic. Right-to-left for manga and vertical text
• Text books — serif, sans, rounded, Mincho and Gothic; size, leading, margins; vertical Japanese writing
• Six papers × six desks — white, cream, parchment, sepia, moss, night / walnut, marble, indigo linen, leather, obsidian, ivory
• Table of contents, bookmarks, full-text search, double-tap to zoom
• Warm filter, page-thickness stack, keep-awake while reading
• Remembers where you stopped. Continue reading with one tap
• No ads, no account, works offline
One-time purchase.
This app is a viewer for your own book files. No books are included.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, satoshi amasaki, 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
- satoshi amasaki
- Size
- 1.8 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. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Copyright
- © 2026 satoshi amasaki
