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tomboy-ng vs UpNote: catalog facts
tomboy-ng	UpNote
Free Free and open source.	Freemium Free to download, with paid plans listed on the pricing page.
Windows, macOS, Linux	Windows, macOS, Linux, Android, iOS, Browser extension
Runs on Linux, Windows and macOS Sync between machines or to a private GitHub repository	Native apps for all major desktop and mobile systems Rich editor with Markdown, code blocks and attachments
No dedicated mobile app; phone access is through a browser via GitHub Rich text rather than Markdown	Closed source Full feature set depends on a paid plan
Downloadable app	Downloadable app, Browser extension
Open source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 23, 2026

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