It can also be called a stopwatch.
It can also be called a timer.
Set a reference time and measure the time.
Because you can measure the excess time
You can measure how the result was for the time you set as your goal.
It has a countdown function.
This application is a paid version of A.Clock.
The screen design and operability are based on A.Clock.
This application is a version of A.Clock with a time signal and a timer added.