shelff
PDF reader
$6.99 · Designed for iPad
Build your PDF bookshelf on iCloud. Organize with folders, categories, and tags. All metadata is stored as files — your data is always yours.
shelff is a reading app for browsing and managing PDFs stored in iCloud.
All your data lives in iCloud Documents. You are never locked into a proprietary database. Metadata is saved as JSON files alongside your PDFs, so even if you stop using the app, your data remains yours.
■ Library
- Organize with folders or browse in a flat list
- Filter by categories and tags
- Sort by title, author, date added, or last read
- Filter by reading status (unread, reading, finished)
- Full-text search across your PDFs
- Switch between grid and list views
■ PDF Reader
- Immersive full-screen reader
- Single page, two-up, and two-up with cover layouts
- Left-to-right (LTR) and right-to-left (RTL) support
- Highlights with optional comments
- Jump from table of contents or annotation list
- In-document text search
- Brightness adjustment
■ Metadata Management
- Edit title, author, publisher, publication date, and more
- Auto-extract initial values from PDF metadata
- Automatic reading status transitions (starts reading, finishes at last page)
■ Data Transparency
- All data stored as files in iCloud Documents
- Metadata in JSON, annotations in the PDF itself
- Accessible anytime from the Files app
- You can search and organize your JSON metadata on iCloud using an AI agent and shelff-mcp on you Mac.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- Added a warning when adding annotations (such as highlights) to PDFs, in case the embedded OCR text gets corrupted. You can turn this warning on or off in Settings.
- Fixed an issue where the Settings screen could not be opened from the sidebar on macOS (Designed for iPad).
The developer, Satoshi Kojima, 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 Kojima
- Size
- 5.6 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 Kojima

