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

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