Dan Winter, just 3 days ago, released his Apple Store app for his heart coherence software.
and it is now available from the itune app store for only $19.99
itunes.apple.com/us/app/heartsring-hrv-breath-biofeedback
Dans website, Heartsring.com, also has more detailed information.
We have info on this software here on our site too...
breakthru-technologies.com/technologies/heart-fusion-mobile-biofeedback