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DockDoor vs uBar: catalog facts
DockDoor	uBar
Free The software is free under its open-source licence. Hosting, hardware and external…	Paid Paid app with a 14-day free trial.
macOS	macOS
Hovering a Dock icon previews every open window for that application, which macOS otherwise leaves you guessing about.	Taskbar or dock mode, switchable to suit how you work Separate bar per monitor, or mirrored across all
This is the free application; the separately sold DockDoor Pro holds the extra features, and it needs accessibility…	Paid after the trial macOS only
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	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 22, 2026	Official website Full listing and sources Checked September 24, 2026

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