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Linux and GNOME only Fedora packages are outdated	Hosted service requires a paid subscription after the trial Pomodoro feature is experimental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