So I tried putting my phone to my chest and recording a voice memo to see if I could hear a heart beat. I'm sure I'm not the first one to try that. Well, I couldn't hear one. And yes, I do have a heartbeat. I just saw my cardiologist today. He's a nice guy. I like him. Anyways, he says my cardiovascular system's no worse than the last visit. Anyways, has anyone used the iStethoscope app? Could my Otterbox case get in the way?