Kronometer

It features the basic stopwatch actions (pause/resume/reset/laps), as well as the ability to save the times and resume them later. Kronometer is part of the KDE Extragear collection, within the Utils sub-module.

Features:

Start/pause/resume the stopwatch widget. Laps recording: you can capture the stopwatch time when you want. Lap times sorting: you can easily find the shortest lap time or the longest one. Reset the stopwatch widget and the lap times. Time format settings: you can choose the stopwatch granularity. Times saving and resuming: you can save the stopwatch status and resume it later. Font customization: you can choose the fonts for each of the stopwatch digits. Color customization: you can choose the color for the stopwatch digits and the stopwatch background. Lap times export: you can export the lap times to a file using the JSON or CSV format.