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Edit and annotate PDFs
Edit text, mark up pages, draw, highlight, and work with document content while keeping more of the PDF visible on the unfolded display.
Optimized for iPhone Duo
PDF Editor, PDF Book Reader® for iPhone Duo
Unfold iPhone Duo.
Read PDFs like a book.
Start with a single PDF page on the outer display. Unfold iPhone Duo and the same document opens into a two-page spread on the larger inner display — giving books, manuals, reports, and long PDFs a more natural reading canvas.
One page folded. Two facing pages unfolded. Your reading position stays with you.
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Single-page when folded
A focused reading view for the outer display.
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Two pages when unfolded
Facing pages use the larger inner display like an open book.
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Keep your place
The document stays aligned as you move between folded and unfolded views.
Two-page PDF reading
One page outside.
A full spread inside.
PDF Editor, PDF Book Reader® is designed to make the fold useful for reading, not simply stretch the same phone interface across a wider screen.
Read a single page while iPhone Duo is folded. Open the device and the PDF expands into two facing pages on the inner display, keeping the current reading position connected across both layouts.
For books and longer PDFs, the result feels closer to opening a real book: two pages are visible together, page pairs are easier to follow, and you can move through the document with a book-like page-turning experience.
A reading experience shaped by the device
A wider screen should not feel like a bigger phone. It should feel like an open book.
The inner display gives PDFs room to breathe. Facing pages sit together naturally, the center of the device becomes a visual spine, and the document can be read as a spread instead of a single oversized page. Fold iPhone Duo when you want a compact reading view; unfold it when you want the context of two pages at once.
Fold
Unfold
Keep reading
More room for your PDF workflow
Read like a book. Work like a PDF editor.
The two-page reading experience is only the beginning. On iPhone Duo, PDF Editor, PDF Book Reader® also gives editing, scanning, OCR, signatures, collaboration, conversion, sharing, and document tools more room to work.
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Scan documents with OCR
Capture paper documents, recognize text with OCR, and turn scans into useful PDFs.
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Fill and sign PDFs
Complete forms, add signatures, and review the surrounding document without losing context.
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Review PDFs together with SharePlay
Collaborate on a PDF during FaceTime with shared reading, annotations, and document review — now with more space for the page and your tools.
Apple technologies
The larger PDF canvas, connected to the Apple ecosystem.
iPhone Duo changes the shape of the workspace, while the app keeps the Apple technologies you already use around your documents — including iCloud, SharePlay, Siri and Shortcuts, and Apple Intelligence features where supported.
Apple Intelligence
Understand documents without leaving the PDF.
Use Apple Intelligence features in supported workflows to help understand and organize document content while staying inside PDF Editor, PDF Book Reader®.
Explore Apple Intelligence
iCloud
Your PDFs stay part of your Apple workflow.
Keep PDFs available through iCloud and Files so the documents you read and edit on iPhone Duo can stay connected with your other Apple devices.
See it in motion
From pocket-sized page to open-book workspace.
Watch PDF Editor, PDF Book Reader® move between folded and unfolded iPhone Duo layouts, then continue through reading, editing, Apple Intelligence, and accessibility workflows.
Designed around the fold
A PDF interface that adapts instead of merely enlarging.
Outer display
Use a focused single-page view when you want the compact, familiar iPhone experience.
Inner display
Unfold for a wider document canvas with two facing PDF pages and more context around your work.
Fold-aware reading
Move between the two layouts while keeping the reading position understandable and continuous.
Full PDF toolkit
Reading, editing, annotation, OCR, signatures, organization, conversion, sharing, and export remain part of the same app.
iPhone Duo FAQ
PDF Editor on iPhone Duo, explained.
Answers to common questions about two-page PDF reading and the app’s document tools on iPhone Duo.
Is PDF Editor, PDF Book Reader® optimized for iPhone Duo?
Yes. The app is optimized for iPhone Duo and adapts its PDF experience between the outer and inner displays.
Can I read two PDF pages side by side on iPhone Duo?
Yes. Unfold iPhone Duo and supported PDFs can appear as two facing pages on the larger inner display, creating a more book-like reading experience.
What happens to my place when I fold or unfold iPhone Duo?
The layout is designed to keep your reading position aligned as you move between the folded single-page view and the unfolded two-page view, so you can continue reading without starting over.
Can I edit and annotate PDFs on the unfolded display?
Yes. PDF editing, annotation, drawing, highlighting, signatures, page tools, and other document controls remain available while the larger display gives the PDF more room on screen.
Does the app include OCR, iCloud, SharePlay, and Apple Intelligence?
Yes. PDF Editor, PDF Book Reader® includes document scanning and OCR, iCloud-based workflows, SharePlay collaboration, and Apple Intelligence features where supported, alongside conversion, organization, sharing, and export tools.
PDF Editor, PDF Book Reader® + iPhone Duo
Fold it for focus. Unfold it for the full page spread.
Read PDFs like a book, then edit, annotate, scan, sign, organize, and share them from the same iPhone Duo experience.