Show HN: Heart rate measure with iPhone and iPod (Promocodes :))

Some weeks ago i asked myself if its maybe possible to hear my own heart with the microphone.

After some testing around with some filters and other tools i decided to code an app for everyone.

It does not work really good for people with slow rates like athletes but i am working on v2 already :)

Here are some promo codes for you =D

9AKA44KP9WMK - 9TNJL4KLEL3M - PEF9H9N93MPY - XYXPKWTP7AWX