It lacks important features While it is very fast, it does lack lots of vital features. Vertical scrolling, jumping to pages, remembering the page it was on and keeping the screen on are ALL missing!
Fastest PDF reader I've seen for Android up till now. Great performance even on low-end tablets. Simple but effective flow for reading: Tapping on the right side of the document either advances to the next page or, if you are zoomed in, moves to the next unread part of the page. Perfect for Calibre Companion users bzw. Also: No Ads, no in-app purchases. Software is open source, code is available from Artifex (makers of Ghostscript).
Screen turns off Useless if there is no control to keep the screen lit
Good but needs improvement Can you make it like Xodo Reader but still being lightweight?
Not enough functions There is no invert and BW function like in GNU/Linux versions of mupdf, also on GNU/Linux mupdf doesn't have Wayland backend.
Solid viewer Nice app that adds viewing for a whole variety of document types, much more versatile than adobe
New MuPDF 1.9 release.
Bidirectional text with opentype font shaping in epub files.
GIF (no animations) and BMP support.
Miscellaneous bug fixes and improvements.
Free PDF reader that allows you to easily view, annotate and sign PDF documents.
Scan docs into clear & sharp image/PDF, to send fax, print out or save to cloud