Install stopwatch by entering the following commands in the terminal:
sudo apt update sudo apt install stopwatch
Description:
Virtual stopwatch and timer
This is a stopwatch and timer program that uses the Tk toolkit. It has millisecond accuracy. Stopwatch can act as a graphical chronometer (it will provides a GUI interface to user).
Homepage: http://expect.sf.net/stopwatch
Version: 3.5-6
Section: universe/utils