With this app you can learn to achieve extended cardiac coherence. The breathing ball gets bigger and smaller. Breathe to the rhythm of the ball. A pulse sensor measures your heart rate and the width of your blood vessels. Extended coherence means that both heart rate and vessel width change evenly with the breathing rhythm. When you breathe in, your heart speeds up and your blood vessels become narrower. Vice versa when exhaling. This will help you achieve an internally completely balanced state of mind. Stess disappears, you become happy and calm. Find out more at https://atemwelt.at