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KleverNotes vs Bookup: catalog facts
KleverNotes	Bookup
Free Free and open source under the GPL-3.0 licence.	Free Free and open source under the GPL-3.0-or-later licence.
Linux	Linux
Markdown-based notes Native KDE application	Notes written in Markdown Native GTK 4 interface for GNOME
Linux only Younger project than established note apps	Linux only Small single-developer project with limited documentation
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: GPL-3.0-or-later
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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