Our measurement is based on the intersection of research, science and technology. We enable measurement of cardiovascular vital data using just a smartphone, and use this data to calculate values that allow for an in-depth look into the state of the body.
The RMSSD tells you how well your body is recovering from stress, and reflects how well the parasympathetic nervous system can help you to regenerate and recover. A high level of stress relief is partly due to a high RMSSD.
The PNN50 is the fraction of consecutive heartbeats with an interval greater than 50 milliseconds between them. Therefore, a higher PNN50 value shows that your heart rate has drastically changed in a short time period.
Respiratory Sinus Arrhythmia (RSA) Amplitude, sometimes referred to as the HRV amplitude, is the change of heart rate believed to be caused by breathing. We measure it by breaking the measurement into sections which match the expected breathing interval of the user – ten seconds in length – , calculating the difference between the maximum and minimum heart rate, and averaging the results found for each of the sections; AVG (Max – Min Heart Rate).
The Tension Index is a heart rate index and is determined by the variability of the heart rate. It is an objective indication of how much stress and tension there is in the body.
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