We recommend use after 20 weeks and best results around 27-30 weeks. HMB takes time and patience and you will need to follow the detailed instructions.

Do not use HMB before 16 weeks.

I’m 23 weeks and the first night I downloaded this I didn't hear anything and got very nervous. I have an anterior placenta so maybe that has something to do with it as well, after a few days of playing with it I can normally find her (sic) after a few seconds! ❤️💕

— maygone8 5* (US App Store)

'Found him or her very quickly very easy to find :)'

— Katie (UK), 26w

I found it in a nano second. It is very very quick to pick it up

— Charlotte Hall (UK), 36w

At first I was sceptical (what can an app actual do...) but thought I’d just pay the $8.99 and try, as I’m a first time mama. At first just heart static and definitely have to move around/find the right spot and be in a very quiet room + be relaxed etc, but eventually I found my own heartbeat and then, after a couple different tries and maybe 15 mins later I found my baby’s heartbeat! Definitely sounds like a heartbeat, not static, and I can tell its not my own heartbeat as well. Absolutely perfect and worth giving it a go for such a low price!

— ClaudiaRose R, 5* (New Zealand App Store)