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TimeTagger vs klog: catalog facts
TimeTagger	klog
Freemium Self-hosting is free; the hosted service is paid after a 14-day free trial.	Free Free and open source under the MIT licence.
Web, Self-hosted	Windows, macOS, Linux, Command line
Interactive timeline for quick insight into spent time PDF and CSV reports suitable for client billing	Time data stays in readable plain-text files you own Published file format specification in the public domain
Hosted service requires a paid subscription after the trial Pomodoro feature is experimental	Command line only, no graphical interface Requires learning the file syntax
Web application, Self-hosted, Hosted service	Downloadable app
Open source	Open source
License: GPL-3.0	License: MIT
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.