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Koncentro vs Pomofocus: catalog facts
Koncentro	Pomofocus
Free Free and open source under GPL-3.0-or-later.	Freemium The timer is free to use in the browser, with some features in a paid plan.
Windows, macOS, Linux	Web
Combines timed work sessions and task lists Supports separate workspace settings	Nothing to install, works on desktop and mobile browsers Task list with pomodoro estimates and finish time
Website blocking uses a local proxy server Assumes no other proxy server is in use	Browser tab only, with no blocking of distractions Some features are part of a paid plan
Downloadable app	Web application
Open source	Closed source
License: GPL-3.0-or-later	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 23, 2026

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