Automated, privacy-first time and application tracking with local data storage and web dashboard.
Free and open source (MPL-2.0).

Notes, tasks & docs
Command-line time tracking and interval reporting with tags and flexible summaries.
Command-line time tracking and interval reporting with tags and flexible summaries.
Track tagged intervals and export time reports locally through a CLI. Toggl Track already offers free individual timers and reports; choose this for offline, account-free local records. No paid billing or team-reporting replacement.
CLI only: no graphical interface, browser timer, team dashboard, or billing integration. Toggl Track also has free individual timers and reports; basic time tracking is not a paid-only feature.
Each comparison covers the workflow described above, rather than every paid feature.