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Flowkeeper vs Vitamin-R: catalog facts
Flowkeeper	Vitamin-R
Free The open-source software is available without a license fee. Hosting, hardware and…	Paid One-time purchase with a 14-day free trial.
Windows, macOS, Linux	macOS
Provides keyboard shortcuts and configurable work sessions.	Structured focus sessions with a clear objective Quick capture of distractions during a session
It is a focus timer rather than a full project-management system.	macOS only Paid after the 14-day trial
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	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 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.