Doesnt work

This app seems confused. It says that I need to hook up headphones that dont have an attached mic. I have the proper headphones it called for. I went & bought some good ones just to use this app so I would get the most out of hearing my unborn babies heartbeat. I think this app needs some work from the creator to make it work the way it already says it does. I never got to hear it using this app because it says I need something I already have. Very confused app.

steph1nyeshua about Fetal Heartbeat Monitor UnbornHeart - Microphone Baby Heart Rate Sound Stethoscope