Is there a way to track row numbers that’ll time stamp ?

I’ve been using excel to write down when I complete a row.

But I’m working on a long dragon tail, with like 70 rows, and I’m getting lost trying to remember if I logged a row or not.

I think a time stamp would be helpful. But something that’d automatically do it for me would be even more helpful

I’m assuming an app? But maybe someone has a website or something more fancy than my brain can think of.