vagus® ecg
breathe ecg

Brain stimulation research
turned into Apple Watch apps

After developing our first vagus nerve stimulation prototype in 2014, we quickly realized that we needed better data and a new type of ‘before and after’  test for our neurofeedback.   Our founder, Gustaf Kranck, invented one – the VAGUS® ECG test for hand-to-hand ECG.  Now it is available for everyone who owns an Apple Watch  (version 4-7).

There is broad consensus from scientists that the vagus nerve is our most important nerve for immunity and health problems such as stress, anxiety, inflammations and depression.   By monitoring the vagus nerve, users can adjust their lifestyles to achieve better health and higher ‘life-quality’.  To give the necessary advice and information to our users,  we process the complex vagus nerve data with artificial intelligence (AI).    Algorithms has to be versatile, thorough and personalized.  

You only need to do the 30 sec. test three times per day to get this unique information on your health.  We calculate the precise correlation between breathing and pulse since it is critically important in establishing the ‘state’ of your vagus nerve ‘right now’. Within seconds our cloud intelligence will display the results on our iOS ‘Vagus® ECG’  and ‘Breathe ECG‘ apps.  

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By doing the BREATHE ECG test with controlled breathing (5 sec inhale and 5 sec exhale), our unique analysis calculates exactly how the person is breathing and provides easy-to-understand feedback.   More than half of our current 5000 Vagus Watch and VAGUS ECG users have problem doing proper diaphragmatic breathing.   By using our tests and feedback, almost everybody improved their breathing within weeks of starting daily testing.    All data is calculated in the cloud and saved there if the user later wants to start using our ‘Nerve Explorer’ cloud service to monitor longer term changes – or subscribe to our breathing coaching partners.   If the user approves, breathing coaches can get real time access to the test results to better help their clients.

Early bird special offer until end of 2021: Download price 2,99 USD/EUR (depending on your region)  Now also including unlimited amount of breathing tests for the first 12 months!


The core of our research has been in understanding how the vagus nerve synchronizes the heart and breathing. By doing the Vagus® ECG test with controlled breathing (5 sec inhale and 5 sec exhale), our unique analysis calculates exactly how the person is breathing and how well the heart beats are correlated with each breath. This oxygenation process is determined by the vagus nerve.

The Vagus® ECG Test and our analytics is what makes us unique (pat. pend.)

The Vagus® ECG app is subscription based, charged quarterly:

US:  6.66 $/month (19.99$/3m), UK: 6.50£/month (19.49£/3m), EU: 7.33€/month (21.99€/3m), Japan: 700¥/month (2100¥/3m)

We built it for ourselves.  We track our health by doing at least three Vagus ECG Tests per day – morning, noon and evening.  We think you will too.  

More facts and science found on our Science page. 

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