We consider user's data as a trust and never misuse it. Audio clips saved by users, never get transmitted by HEARD to any outside server unless the user decides to share the audio via email or facebook.
We use a popular 3rd party analytics service called Flurry to better understand how our users use the product. Flurry gathers some data, including the device's MAC address, and sends to their server which is then managed according to Flurry's' privacy policy .
As with any voice recorder, it is advised that you don't record anyone without their prior permission. Not doing so might lend the user in violation of privacy protection laws in several states.