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Linwood Butterfly vs Rnote: catalog facts
Linwood Butterfly	Rnote
Free Free and open source under the AGPL-3.0 licence.	Free Free and open source, with optional sponsorship of the developer.
Linux, Android, Web	macOS, Linux
Infinite canvas instead of fixed pages Strokes and elements stay editable after placing them	Pressure-sensitive stylus input with configurable strokes Imports and annotates PDFs and images
Freeform canvas suits handwriting more than structured text notes Infinite canvas documents can be harder to navigate than linear notes	Native file format is unstable between versions macOS builds come from a separate project
Downloadable app, Web application	Downloadable app
Open source	Open source
License: AGPL-3.0	License not stated
Not stated if an account is needed	No account needed
Not stated if it 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 September 23, 2026

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