Furtherance is a free and open source time tracking application for Linux. Using Furtherance you can add track time task entry, edit that time, delete task entries. It is released under the GNU General Public License v3 and written in Rust and based on GTK4. In this app you can also group the task by name and date, edit the task name, time, and date. It also comes with dark mode, notify of idle and limit the tasks shown.