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Noteshelf vs Xournal++: catalog facts
Noteshelf	Xournal++
Freemium Free to download, with paid options and enterprise plans.	Free Free and open source under the GPL 2.0.
macOS, iOS	Windows, macOS, Linux
Realistic pens and many paper templates for handwriting PDF annotation with highlights and sticky notes	Pressure-sensitive stylus support on Wacom, Huion and XP-Pen tablets Annotates on top of PDFs while keeping their text selectable
Limited to Apple devices according to the homepage Best used with a stylus	Not a PDF editor; it draws on top rather than changing the document Touch and palm rejection need configuration on some tablets
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 21, 2026

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