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 and email a spectrogram of the audio, shows tips and information, 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 medical devices in the future.

Developed in collaboration with cardiologist researchers. Used by cardiologists for research on heart disease as described in the Journal of Medical Devices. For best results:
- Use good quality headphones (heart sounds are often too deep to hear using the white earphones).
- Press the microphone in the bottom of an iphone 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 8 seconds and see a phonocardiograph display and a spectrogram. Press the little envelope and you can email the audio and the spectrogram image to anyone you like! Go to Settings and modify every major setting, including sample rate, audio delay, audio filters, spectrogram scaling and accelerometer update frequency.

WARNING! It takes time to learn how to listen to your heart. You may need to watch the youtube videos. Don't give up! If you are patient, this app will help you to learn the necessary skills. 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!


If you would like to learn how to listen and use the spectrogram to identify specific heart conditions, please check out my app iAuscultate, developed in collaboration with cardiologists.

For more help, please check out the videos by going to my youtube channel "writingpeter":
http://www.youtube.com/writingpeter