When comparing Foliate vs KDE Okular, the Slant community recommends Foliate for most people. In the question“What are the best eBook readers for UNIX-like systems?” Foliate is ranked 2nd while KDE Okular is ranked 4th. The most important reason people chose Foliate is:
Important for example for IT books (source code) or other reference books.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Supports coloured text
Important for example for IT books (source code) or other reference books.
Pro Minimal reading UI
When reading, there is only a customizable progress indicator at the bottom, and the title at the top.
Pro Free and open source
Pro Trim margins
Easily trim margins either automatically or manually for easier reading
Pro Featureful
Pro Table selection
Pro Tabbed view option
Pro Supports touch interaction
Cons
Con No PDF support
Foliate cannot be used to read PDFs, which may be a problem for those who read many documents in this format.
Con No XFA Adobe Forms support
Cannot fill PDF Forms created with Adobe.
Con Requires many KDE libraries
Con No middle-mouse auto-scrolling
Instead of scrolling automatically when holding down the mouse wheel and dragging, it instead zooms in or out, in contrast with many other programs.
Con Poor HiDPI support
You may have to tinker with QT__SCALE_FACTOR environment variables to get the desired size and not blurry content (this is a bug; see https://bugs.kde.org/show_bug.cgi?id=362856 and https://bugs.archlinux.org/task/54688)
Con No search results overview
You have to navigate to next/previous hit one by one
Con No "fit to page" option under printing settings
You can only print the content as given so, when you receive a bigger or smaller image thant the default of the printer, you will have to edit it first on other editor.
Con Slow scroll
Its new ultra-slow-scroll for PgUp and PgDn makes it unuseable.