I was doing so good only listening to the heartbeat once a week. This past weekend we were visiting family and listened three days in a row. Today I felt the need to listen again as I read something on this app that has me stressed. Well I found the heartbeat a few times but couldn't get the heart rate to register right. So I listened on and off for almost an hour. When I found the heartbeat I only listened for less then a minute. Now I'm even more stressed that I used the Doppler too long :(