I want to see how many words and how many hours you've worked in a day.

I want to build my writing muscles by comparing how many words I've written in a day to how many I've written in a month. I don't do it because it's cumbersome to write it down every time. I want to see how long I've been writing while the app is open or how much I've been writing. I want to know how long I've been focused, which is different from a timer.