Libellus One: Documents, Notes
PDF Reader, Search & Annotate
$4.99
Your library. Your workspace. Read documents, watch local videos beside your reading, and keep source-linked notes.
Bring your reading and your thinking together. Libellus One combines a local document library, PDF search and Workpapers on iPad and iPhone.
BUILD YOUR LIBRARY
Import files or whole folders with subfolders. Connect to iCloud, WebDAV or a web portal, or sign in to Google Drive to browse and download selected files and folders. Keep local copies organized and available offline. Give a document a Custom Name while retaining its original file name.
FIND NAMES AND PASSAGES
Search document names, custom names and readable PDF text. Search your whole Library or selected folders. Open a matching passage and continue searching inside the PDF.
READ AND TAKE NOTES
Use one compact toolbar across PDFs and Workpapers. Write with Apple Pencil or enable finger drawing, highlight, erase and add straight or serrated underlines. Place editable text boxes with font, size and color controls. Move or resize your text and return to navigation with the Hand tool. Edits save automatically, with session Undo and Redo.
KEEP THE SOURCE
Take a Note turns a selected passage into a source-linked Workpaper card. Tap its reference to return to the original. Readable text in PDF, TXT, DOCX and XLSX is supported.
MAKE ROOM TO THINK
Use Double Screen for two documents or a local video beside your reading. Arrange Workpapers beside or below documents. Adjust dividers, zoom, and move your toolbar to any corner. Navigate with thumbnails, outlines and bookmarks.
CHOOSE YOUR WORKSPACE
Place navigation on the left, right or bottom, with icons or labels. Keep navigation and document tabs visible or let them appear automatically when needed. Choose horizontal or vertical page turning and continuous or page-by-page reading. Reading mode adds a display-only warm paper tint. An English User Guide is included offline.
Cloud connections require your own authorized account and internet access. Google Drive downloads are local copies, not automatic remote synchronization; provider access rules apply. Downloaded documents and Workpapers remain available on your device. PDF text search requires readable text; scanned or protected files may not be searchable. Apple Pencil requires a compatible iPad.
Ratings & Reviews
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Share your Workpapers as editable Libellus files. Text, drawings, highlights and captured images stay together, ready to continue working on another device.
Use Share Workpaper in the … menu. Open a received file with Libellus or choose Workpapers > Import Workpaper. Each import creates a separate copy; source documents are not included. Both devices need Libellus One 1.0.4 or later.
The launch logo now matches the App Store icon.
The developer, SERHAN KAYMAKCI, 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 Linked to You
The following data may be collected and linked to your identity:
- Contact Info
- User Content
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- SERHAN KAYMAKCI
- Size
- 9.3 MB
- Category
- Productivity
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later.
- iPhone
- Languages
- English
- Age Rating
16+
- 16+
- Contains
Unrestricted Web Access
- Copyright
- © 2026 Serhan Kaymakçı

