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Koncentro vs Pomatez: catalog facts
Koncentro	Pomatez
Free Free and open source under GPL-3.0-or-later.	Free Free and open source.
Windows, macOS, Linux	Windows, macOS, Linux
Combines timed work sessions and task lists Supports separate workspace settings	Customisable Pomodoro rules Built-in task list
Website blocking uses a local proxy server Assumes no other proxy server is in use	Full-screen breaks do not support multiple monitors Keyboard shortcuts cannot be customised
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: MIT
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 1, 2026

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