Flatsonar

KOReader

by KOReader Community

Ebook reader

Dangerous permissions Verified creator AGPL-3.0-only vv2026.07.1
Screenshot 1 of KOReader Screenshot 2 of KOReader Screenshot 3 of KOReader

About

KOReader is an ebook reader optimized for e-ink screens. It can open many formats and provides advanced text adjustments.

See below for a selection of its many features:

  • Supports both fixed page formats (PDF, DjVu, CBT, CBZ) and reflowable e-book formats (EPUB, FB2, Mobi, DOC, CHM, TXT, HTML). Scanned PDF/DjVu documents can be reflowed. Special flow directions for reading double column PDFs and manga.
  • Multi-lingual user interface optimized for e-ink screens. Highly customizable reader view with complete typesetting options. Multi-lingual hyphenation dictionaries are bundled in.
  • Non-Latin script support for books, including the Hebrew, Arabic, Persian, Russian, Chinese, Japanese and Korean languages.
  • Unique Book Map and Page Browser features to navigate your book.
  • Special multi-page highlight mode with many local and online export options.
  • Can synchronize your reading progress across all your KOReader running devices.
  • Integrated with Calibre, Wallabag, Wikipedia, Google Translate and other content providers.

Permissions

2 permissions weaken the sandbox. Flatsonar asks before installing.

  • all devices (/dev): webcams, disks, raw hardware
    --device=all
  • full access to your entire file system
    --filesystem=host
  • inter-process communication (needed for X11)
    --share=ipc
  • network
    --share=network
  • X11 display, only when Wayland is unavailable
    --socket=fallback-x11
  • Wayland display
    --socket=wayland
  • access to xdg-run/gvfs
    --filesystem=xdg-run/gvfs

Who publishes this

The creator demonstrably controls this app id: Flathub verification, the hosting account owns the namespace, or a well-known file on their domain.

  • verified on Flathub: the developer proved they control this app id
    publisher:flathub

Maintenance

Recent activity on the upstream repository, or built and reviewed by Flathub.

No staleness signals: recent activity, or built and reviewed by Flathub.