You're better off spending $30 on a doppler that actually works. I downloaded it and put it on all sorts of surfaces and it didn't produce a glass heartbeat, I put it on my chest and it worked, so when I put it on my belly I thought it was working. Apparently my boyfriend is pregnant too because the same beating it tells you to look for came from his stomach lol. Then I bought a doppler and found my little ones hb no problem.