AppMarketSpy › Book › Viewer DUO
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App info
- Developer
- satoshi amasaki
- Category
- Books, Utilities
- Released
- Sep 17, 2026
- Version
- 1.0 (Sep 17, 2026)
- Price
- $2.99
- Size
- 1.7 MB
- Requires
- iOS 17.0
- Age rating
- 4+
- Languages
- English and Japanese
In-app purchases
noneCurrent prices, App Store US.
Release date
The release date was moved 1 time before launch.About Viewer DUO
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…
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