Thanks for the feedback. Yes, the visual timer is mostly for people with ADHD, who suffer from time-blindness. I can see your point of it being stressful.
Pomodoro is one part of it. It's more about focusing on current task at hand with something always on your screen to keep you accountable.
If you are down, feel free to join our discord channel: https://discord.gg/GavhgFrt9E