Just realized due to Szybet's InkBox app post that Aramir made a standalone Qt app using OfficerAction's /Rain92's kobo-qt-setup-scripts.
https://www.mobileread.com/forums/sh...d.php?t=340822
https://github.com/Aryetis/Obenkyobo...r/DevReadme.md
https://github.com/Rain92/qt5-kobo-platform-plugin
Also note NiLuJe's additional suggestion of adding a plugin to KOReader, with lua scripts!