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Saber vs Noteshelf: catalog facts
Saber	Noteshelf
Free Free and open source.	Freemium Free to download, with paid options and enterprise plans.
Windows, macOS, Linux, Android, iOS	macOS, iOS
Built specifically for handwriting and stylus input Runs on Android, iOS, Windows, macOS and Linux	Realistic pens and many paper templates for handwriting PDF annotation with highlights and sticky notes
Focused on handwriting, less suited to typed notes Best experience needs a device with a stylus	Limited to Apple devices according to the homepage Best used with a stylus
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Works offline	Not stated if it 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.