Nice! I compulsively cycle through my open browser tabs, so having this nestled in there means that I'll inevitably land on it every once in a while and take a moment to breathe.
I love the circle animation at the top of the page. This made it easy for me to focus on the right rhythm.
I love this. I actually bought a Fitbit mainly for this functionality.
Pretty cool! I like it. Good reminder. The movement is nice.