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OpenDisplay vs spacedesk: catalog facts
OpenDisplay	spacedesk
Free Free and open source under GPL-3.0, with optional donations.	Free Offered as free display extension software.
macOS, iOS	Windows, macOS, Android, iOS, Web
True extended display, not just mirroring Works over USB or Wi-Fi with touch and scroll input	Works over USB, Wi-Fi or LAN Viewers for Android, iOS, Windows and any HTML5 browser
Only extends Macs; Windows and Linux hosts are not supported Maintained by a single developer	Primary machine is mainly Windows Wireless performance depends on the local network
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	Not stated if an account is needed
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.