It's pretty easy to make your own analytics. It's not famous, but I open-sourced mine; it's called Bast, written mostly in Rust, and it's easy to deploy it. https://github.com/kooparse/bast
I did the same for my Go library [0], but I don't think it's "pretty easy" if you want to do it right. Especially filtering out bots is a constant hassle, it needs to be tested, maintained, just like any other software. So, paying something like $4 is worth it, if you don't want to think about it as much.
You have a very good looking UI there. I really love the simplicity.