Good...but needs some tweaks....
I like the idea of this app and its a good start. Ive been using guided breathing to lower my BP for a couple of years. BUT - the timing of this app is off. Good guided breathing has you breathing IN through your nose and OUT through your mouth - the way the inhale and exhale timing is set on this app makes that difficult as it calls for a short inhale and longer exhale - backwards for GOOD breathing technique. Fixing this (or allowing it to be customizable) is KEY to this becoming a great app. A few more types of tones would be nice and maybe to be able to set this to be automatic - so it pops up to remind you a few times a day - would be really nice to have.
DigiMeg about
Breathing Zone