Apps similar to PDF Assistant include Okular, which is free and open source. Other options are Foxit PDF Reader, Evince, PDF-XChange Editor and Adobe Acrobat Reader. PDF Readers like PDF Assistant are a crowded field, with more than 25 alternatives for Windows, Mac, Android, iPhone and Linux.
Multi-platform document viewer supporting PDF, ePub, comics, images, and Markdown with annotation, digital signature verification, tabbed interface, sidebar navigation, text selection, text-to-speech, magnifier, search, dark mode, and plugin support.
Germany
EU
Foxit Reader offers a lightweight PDF viewing experience across multiple platforms with features such as annotation, form filling, signing, cloud storage integration, collaborative review options, heightened security via Trust Manager, and organizational tools like Group Policy and XML Configuration.
United States
Supports viewing and editing PDF annotations, displays multiple formats such as PDF, Postscript, DjVu, comic books, TIFF, DVI, XPS, remembers per-document zoom and position, features search, table-of-contents navigation, SyncTeX integration, and printing.
United States
Feature-rich PDF editor offering direct content editing, ABBYY OCR, viewing, annotation, form filling, PDF merging, compression, and encryption. Operates efficiently offline, requiring no registration and no ads, while providing privacy-focused features and convenient portability.
Canada
Seamlessly view, annotate, and collaborate on PDFs with freehand drawing and sticky notes. Utilize cloud storage for effortless access and upgrade for advanced editing and conversion to formats like Word and Excel.
United States
Qiqqa is a free research and reference manager. Search for, read and annotate your PDFs. Then review your work, write up and create bibliographies instantly.
United Kingdom
PDF viewer for macOS supports scientific papers, annotations, highlights, bookmarks, split view, exporting notes, AppleScript, multiple annotation types, bibliography integration, full-screen, search, and compatibility with various macOS versions.
Xodo is the ultimate cross-platform PDF viewer and annotator. Powerful, fast, and optimized for all phones and tablets, Xodo makes it easy to access, edit, share, sync, manage, sign, and more.
Canada
Create, Convert, Review and Edit PDF Documents on Windows, macOS, and Linux.
United States
The top AEC PDF app to markup and manage drawings and documents. Ideal for replacing pen and paper, avoid printing documents again by using our intuitive feature set that makes marking up a PDF easy. Open or create a new PDF, markup using our extensive array of tools, then save...
Australia
With GoodReader on your iPhone, iPod Touch or iPad, you can read virtually anything, anywhere. Books, movies, maps, pictures; GoodReader puts it all in a single app, right in your pocket.
Japan
A web-based, all-in-one PDF editor that lets users upload, edit, annotate, sign, merge, split, and convert PDF and other file formats (DOC, DOCX, JPG, PNG), all in a secure, browser-based interface.
