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TimeTagger vs Hamster: catalog facts
TimeTagger	Hamster
Freemium Self-hosting is free; the hosted service is paid after a 14-day free trial.	Free Free and open source under the GPL-3.0 licence.
Web, Self-hosted	Linux
Interactive timeline for quick insight into spent time PDF and CSV reports suitable for client billing	Local time tracking with no account Packaged in Debian, Ubuntu and openSUSE
Hosted service requires a paid subscription after the trial Pomodoro feature is experimental	Linux and GNOME only Fedora packages are outdated
Web application, Self-hosted, Hosted service	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0
Not stated if an account is needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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