iStethoscope Pro turns your iPhone into a stethoscope, allowing you to listen to your heatbeat and see your heart waveform, or listen to other quiet sounds around you. As seen on TV around the world!

The professional version includes the ability to see realtime spectrogram of the audio, email the audio in three different formats, and has no adverts.

Please note that this app is intended to be used for entertainment purposes and as a demonstration of the technology. It is not intended to be used for the diagnosis of disease or other conditions, or the cure, mitigation, treatment, or prevention of disease and should not be used as a medical device. We are working to develop fully certified iPhone apps that may be used as a medical device in the future.

Developed in collaboration with cardiologist researchers. Described in the Journal of Medical Devices. For best results:

  • Use good quality headphones (heart sounds may be too deep to hear using the white earphones).
  • Press the built-in microphone in your iOS device (iPhone or iPad) to your chest. A good place is the apex of your heart (below your left nipple).
  • Place the microphone directly against the skin, not through a shirt.
  • Take the iPhone out of its protective case if you use one.

With practise you should be able to find a wonderful clear sound. Shake the iPhone to hear the last 9 seconds. Press the share button and you can email the audio to anyone you like! Go to Settings and modify every major setting, including filter crossover frequency, amplifier gain and user interface sounds.

WARNING! It takes physicians years to learn how to use stethoscopes correctly and the iphone microphone is smaller than a conventional stethoscope diaphragm. You cannot place the microphone randomly and expect to hear your heart - you must place it very accurately. To hear your heart you must learn where to listen! Watch the videos for help.