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




PDF X is described as 'Productive PDF reader & editor for Windows. It's powerful for users to view, print, edit, and annotate Adobe Acrobat PDFs' and is a PDF Reader in the office & productivity category. There are more than 50 alternatives to PDF X for a variety of platforms, including Windows, Mac, Linux, Android and iPhone apps. The best PDF X alternative is SumatraPDF, which is both free and Open Source. Other great apps like PDF X are Okular, Foxit PDF Reader, Evince and PDF-XChange Editor.
Orion is a pdf, djvu, xps and cbz file viewer for Android devices, based on mupdf and DjVuLibre libraries.




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




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.

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.


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.


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.




The simplest PDF viewer. Safe (doesn't require permissions), lightweight (just 6,9MB) and modern.

Looking for methods to edit, merge,split,convert,rotate,annotate and other related manipulate on PDF? SwifDoo PDF will match your needs and handle most of your PDF-related jobs.




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.




Free, open-source desktop app for legally binding PDF digital signatures. Sign with PKCS#11 hardware tokens, USB dongles, smart cards, PFX certificates, or Windows keystore. Adobe-compatible, RFC 3161 timestamped, fully offline — no cloud, no subscription.




PDF Viewer Pro is a fast and beautiful app, allowing you to view, search, and annotate PDF documents with ease on your iPhone and iPad.



