Would never pay for it
This app uses the microphone of the iPhone and you can only hear whats happening by using headphones. Now, I dont know about the rest of you, but there was no way to get the microphone anywhere close enough to my 33-week pregnant belly to be able hear anything other than the movement of the phone since the headphone jack is in the way. Every single attempt was just the sounds of me moving the phone around trying to hear anything. Like others, I even tried listening to my own heartbeat and could find nothing.
Lindzo. about
Baby's heartbeat Free