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Bookup vs Swifty Notes: catalog facts
Bookup	Swifty Notes
Free Free and open source under the GPL-3.0-or-later licence.	Free Free and open source under the MIT license.
Linux	macOS, Linux
Notes written in Markdown Native GTK 4 interface for GNOME	Native GTK and Adwaita interface Markdown editing with preview
Linux only Small single-developer project with limited documentation	Small project with a limited user base Sync options are not described in the research
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: MIT
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.