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TimeTracker vs TimeTagger: catalog facts
TimeTracker	TimeTagger
Free Free under GPL-3.0; an optional purchased key hides donation prompts.	Freemium Self-hosting is free; the hosted service is paid after a 14-day free trial.
Web, Self-hosted	Web, Self-hosted
Time tracking and invoicing in one tool Peppol and ZUGFeRD e-invoicing support	Interactive timeline for quick insight into spent time PDF and CSV reports suitable for client billing
Large feature set can feel heavy for simple use Shows donation prompts unless a key is bought	Hosted service requires a paid subscription after the trial Pomodoro feature is experimental
Self-hosted	Web application, Self-hosted, Hosted service
Open source	Open source
License: GPL-3.0	License: GPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it 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.