Orion is a pdf, djvu, xps and cbz file viewer for Android devices, based on mupdf and DjVuLibre libraries.
Cost / License
- Free
- Open Source
Application types
Platforms
- Android
- Android Tablet
- F-Droid




Sav PDF Viewer is described as 'The simplest PDF viewer. Safe (doesn't require permissions), lightweight (just 6,9MB) and modern' and is a PDF Reader in the office & productivity category. There are more than 50 alternatives to Sav PDF Viewer for a variety of platforms, including Windows, Mac, Android, Linux and Web-based apps. The best Sav PDF Viewer alternative is SumatraPDF, which is both free and Open Source. Other great apps like Sav PDF Viewer are Okular, Foxit PDF Reader, Xournal++ and Evince.
Orion is a pdf, djvu, xps and cbz file viewer for Android devices, based on mupdf and DjVuLibre libraries.




Supercharge your paper reading: follow references, skim outline, jump to figures, cite and save.




In version 8, Google Chrome introduced a free PDF viewer, installed by default. While this plug-in lacks many features of the Adobe Acrobat Plug-in, it is much faster and lighter, and updates with the browser rather than an external utility.

Besides exceptionally fast launching and displaying speed, Gaaiho Reader is reliable in printing, filling forms annotating documents and adding bookmarks.




Ashampoo PDF Free is a software for opening, reading, and creating PDF files. It includes a built-in printer driver for generating PDFs from any Windows application, a compact and fast PDF reader, and the ability to fill out interactive and static forms.


A simple PDF document viewer, in the lines of Evince but without using the Gnome libraries. ePDFView is a free lightweight PDF document viewer using Poppler and GTK+ libraries.

EBookDroid is an open source (GPL'ed) document viewer for Android based on the VuDroid code base.


Offers viewing, searching, printing, and text copying for PDF files on Android. Streamlined for quick access and on-the-go use, optimized for work environments without Drive integration, lightweight, free, and requires minimal permissions.




Read, edit, annotate, and sign PDF documents with built-in AI features like summarize and translate, OCR in 50+ languages, fill forms, export to major formats offline, apply watermarks, compress files, secure with passwords, and use text-to-speech on all major platforms.




Privacy-first, offline PDF editor for Android. Merge, split, compress, convert and annotate PDFs — 100% on-device, no internet required.




PDFChef enhances document management with cross-platform support on PC, Mac, iOS, and browsers. It offers text-editing, page rearranging, conversion tools, and cloud-based sharing. Supporting various file formats, it also enables users to add signatures directly to PDFs for swift document finalization.




AI powered productivity tool for reading, understanding and taking notes on PDFs and long websites. Users can search, summarise, extract and define keywords, ask google-search type questions and be taken straight to the answers.



