After how many weeks can I expect to hear my baby?

30-40 weeks, but it may be as early as 19 weeks. The app amplifies the sound in your uterus and as the baby’s heart gets bigger and stronger the more we are able to hear.

I can’t hear a heartbeat, what should I do to improve my chances?

Hear My Baby is designed to allow you to hear your baby’s heartbeat, but isn’t foolproof and it may take a few attempts to find your baby’s heartbeat. Midwives frequently need a few attempts using ultrasound, so it may be the same for you. Others may do it first time.

If not, here’s what we suggest...

  1. Take off the phone case.
  2. Make sure you’re in a quiet room without distraction.
  3. Relax. It is easier to find the baby’s heartbeat when lying down in a relaxed position.
  4. Place the phone perpendicular to your tummy, ensuring the microphone has full contact with the skin.
  5. Wait 10 seconds and if without luck, move the phone to a different position.
  6. Try the lower front part of your tummy first.
  7. If you are unable to find the baby’s heartbeat, try your own first.
  8. You may need to wait a few hours for the baby to move into a better position to be heard. It is important to persevere and not be disheartened if it proves difficult the first few times. Good things come to those who wait!
  9. Check your sound volume is turned up, sometimes having the sound on mute can be the most obvious fault.
  10. Don't have the sound too high otherwise you may get a false positive caused by a feedback loop. We recommend 1/3 volume when listening to prevent this.

Yes, I've done all that, and still can't find it...

In some, not many, but some cases, it may not be possible, or the heartbeat may be difficult to hear due to the position of your Placenta. This is because the Placenta can be towards the front of the tummy making it very difficult to hear the acoustics of the heartbeat. Give it a little while though as it could just be that the baby is in the wrong position, and it does take a bit of work to find, and depends too on how many weeks your baby is. It is unusual (but possible!) to hear results before 18-20 weeks.

If this is the case, and you can't get a result EMAIL us, and we'll explain how to get a refund from Apple. We want you to be delighted with HMB. 

Can you recommend positions to best hear my baby?

Your baby moves quite often, but towards the end of the pregnancy generally (but not always) will be in a ‘head down’ position with their back to your front. Trying at the lower part of your tummy would be a good place to start. If you have a frontal placenta it may be more difficult to hear the baby, so between 30-40 weeks will give you the best possibility to hear your baby.

Does the app work the same as ultrasound?

No, we simply use the microphone in your phone, which is very sensitive, to pick up the baby’s heartbeat.

Can the app harm my baby?

No, but in order to eliminate any risk, we DO NOT recommend using the app when not in airplane mode which disconnects the phone from the wifi and cellular network. Once done the app is as safe as a fetal doppler machine.

What is the facebook group?

Hear My Baby’s Facebook group is a support group for the community so that you can help other mothers and share your results from using the app. You can join the group here.

How do I switch my phone to airplane mode?

Simply go to your phone’s settings and select ‘airplane mode’.

I can’t find my own heartbeat. Help!

  1. In your phone’s settings go to 'privacy' and then ‘microphone’. You’ll need to ensure that you have enabled the microphone for Hear My Baby, otherwise the app won’t function.
  2. Make sure you are in a quiet room.
  3. Take the phone out of its case.
  4. Give the microphone (normally located at the bottom of the phone) good contact with the skin, (place the phone in a 90 degree to the skin position on your left breast towards the center of your body).
  5. Place it at the bottom of the left breast rather than the top for best results.

In the event that none of the above work, it may be the your phone didn't request access to the microphone. We would strongly recommend reinstalling, which won't cost you anything. Do so by deleting the app from your iPhone first otherwise the reinstall may not work correctly.

Even my sofa has a heartbeat!

We get this a lot! :)

All that has happened is that the app works by enhancing given ranges of sounds for both yours and the baby's heartbeat. Sometimes this means it picks up reverberations from televisions, music, jack-hammers, trucks outside, washing machines, dishwashers and if those reverberations have a regular timing they may sound like a heartbeat. However, it is very easy to distinguish. 

  1. Your sofa is an inanimate object. It clearly doesn't have a heartbeat.
  2. The heartbeat examples on our facebook page highlight what a real heartbeat should sound like. It isn't totally rhythmic or consistent. We're not faking anything, simply that the object on which the iPhone is placed is picking up a sound in the heartbeat range.
  3. Sometimes moving the bottom mic of the iphone over a fabric may sound like this for a few seconds, but it won't be consistent. If you find the the heartbeat you'll be able to hear it for a while if the baby stays still.


We've found a bug that affects some users who may report their arm or sofa has a heartbeat. This is due to feedback caused by the volume being high on the device and causing a feedback loop which sounds similar to a heartbeat. 


  • Turn the volume off and see if the problem is still occurring. It shouldn't be, and you can judge this by the wave form identified on the device. If it is still occurring email us!
  • Then, when the volume is off, turn up the volume slightly to so you can hear the app, and so that it is audible. Then try again. At low volume settings you should be able to hear but not suffer from feedback loops that may sound like a heartbeat. 


How fast should my baby’s heartbeat be?

Around twice the speed of yours, between 120 to 160 beats per minute.

Sharing your recordings

Sharing that special moment in Hear My Baby is super easy. You can share in two ways, straight into Facebook or via email.

Don’t forget to tag your loved ones when sharing in Facebook so that they see the video immediately. You can share to any page or group you're a member of via the ‘share’ button within Hear My Baby - not just to your main timeline.

The Hear My Baby group are always delighted to hear when you’ve been able to record that special moment, so do share your success with them.

We have a very strong concern for your privacy so we don’t store your video and you can delete it from your Facebook account whenever you wish.

Is Hear My Baby a medical device?

No. It is in no way a replacement for professional medical advice.

I've done everything and I still can't get a result.

Use the support button and email us.

We want you to be happy and if we can't help then we'll explain how to get a refund from Apple. We care about your experience with HMB, and so if HMB didn't give you great value and you didn't feel it was more than worth the money, your baby is past 30 weeks and you weren't able to hear your own or the baby's heartbeat, we'd rather just explain how to go about getting your money back from Apple. This rarely happens though as out of 5,000 users in February 17 only a handful of refunds were requested, and, we suspect most of those has the Placenta at the front of the tummy.

Your goodwill is important to us, and it doesn't matter to us if you keep the app. Life's too short, and we'd rather you knew we cared about what we do and how you feel about us.

If you still feel unhappy, just drop us a line and we'll help you sort it :)