Learn how to breathe?

The following is a complete description of what the app does: you press a play button, and a voice says "breathe in... breathe out..." over and over while a piano note is struck and a colorful circle gets larger and smaller.

I can see this app being useful for people who never learned how to breathe. For those of us who learned to do so at birth, its a waste of time.

yapishkahilt about Breathing Zone, v2.6