Sioyek is a PDF viewer with minimal interface optimized for reading research papers and technical books.
Platforms
- Mac
- Windows
- Linux
United States




Apps similar to Lectern include Sioyek, which is free and open source. Other options are Skim, Preview and PDF Expert. In total there are four PDF Readers like Lectern for Mac, iPhone, iPad, Windows and Linux.
Sioyek is a PDF viewer with minimal interface optimized for reading research papers and technical books.




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.

Native macOS app for viewing, annotating, and editing images and PDFs, featuring tools for cropping, rotating, resizing images, rearranging pages, full-screen viewing, markup, document merging, batch conversion, and export in multiple formats.




Read, annotate, and highlight PDFs, fill interactive forms with saved input, underline or strike through text, manage bookmarks, sync files from cloud services, and share documents. Compatible with Preview and Adobe Acrobat annotations, supporting extensive iOS features.



