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Flowkeeper vs Pomello: catalog facts
Flowkeeper	Pomello
Free The open-source software is available without a license fee. Hosting, hardware and…	Free The developer states it is available for free on Mac, Windows and Linux.
Windows, macOS, Linux	Windows, macOS, Linux
Provides keyboard shortcuts and configurable work sessions.	Uses Trello boards and cards as the task list Minimal timer that takes little screen space
It is a focus timer rather than a full project-management system.	Built around Trello, so it suits people who do not use Trello less well Limited to the Pomodoro workflow
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 2, 2026

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