How long do I use the program?

Question

Windows

How can I find out how much time I spent on (was included in) the program?
(Like Play time or something like that)
Windows 8.1

Answer 1

And I use this program.
crocotime.com/ru
Put on the server or locally, but this is the server. Then you download a small program and install it, this is a client. Run it and it counts.

Answer 2

https://www.rescuetime.com/