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Noteshelf vs Saber: catalog facts
Noteshelf	Saber
Freemium Free to download, with paid options and enterprise plans.	Free Free and open source.
macOS, iOS	Windows, macOS, Linux, Android, iOS
Realistic pens and many paper templates for handwriting PDF annotation with highlights and sticky notes	Built specifically for handwriting and stylus input Runs on Android, iOS, Windows, macOS and Linux
Limited to Apple devices according to the homepage Best used with a stylus	Focused on handwriting, less suited to typed notes Best experience needs a device with a stylus
Downloadable app	Downloadable app
Closed source	Open 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 September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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