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Weylus vs Duet Display: catalog facts
Weylus	Duet Display
Free Free and open source.	Paid Paid app with plans listed on the pricing page.
Windows, macOS, Linux	Windows, macOS, Android, iOS
No app needed on the tablet, only a web browser Pen and touch input from the tablet reach the computer	Uses tablets and phones as extra monitors Drawing tablet mode for illustration
Releases are infrequent Works best on a fast local network	Paid, with features split across plans Requires an account
Downloadable app	Downloadable app
Open source	Closed source
License: AGPL-3.0	License not stated
No account needed	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 October 1, 2026

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