Compare software

Duet Display vs spacedesk: catalog facts
Duet Display	spacedesk
Paid Paid app with plans listed on the pricing page.	Free Offered as free display extension software.
Windows, macOS, Android, iOS	Windows, macOS, Android, iOS, Web
Uses tablets and phones as extra monitors Drawing tablet mode for illustration	Works over USB, Wi-Fi or LAN Viewers for Android, iOS, Windows and any HTML5 browser
Paid, with features split across plans Requires an account	Primary machine is mainly Windows Wireless performance depends on the local network
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Account needed	Not stated if an account is needed
Not stated if it works offline	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.