The whole idea of pomodoro comes from a physical kitchen timer in the shape of... you guessed it, a pomodoro. The best UX for the pomodoro technique can be found in this physical kitchen timer, if you'd ask me.
I think functionally the Focus Dial (I linked to it in my README as well) is the much better „product“ and keeps exactly that UX compared to what I built. I had to face the reality of my own limited knowledge and skillset to build something like that (and wanted to do my own thing), plus I really ended up liking that epaper display.
Now that I read your post and look at the photos, I think you definitely add something with the division of certain tasks! Besides, it's always cool to build something yourself, so please don't read my previous comment as a snark about reinventing the wheel or something. I just really appreciate the simple mechanical kitchen timer recommended for the pomodoro technique.