The quote below is what I’ve been searching for as I tend not to breath at all, just very shallow.

“In a matter of days this tester learned that she was holding in her breath in everyday situations when it was not necessary. That was an eye-opener. A more in depth test would require several weeks or months and one might wonder if, long term, the hope is that Spire would lead to self-awareness that would make the breath tracker obsolete.