Atemresonanz – HRV Trainer

Breathing apps dictate the same rhythm for everyone. Your heart has its own.

Resonant breathing—calm and without noise.

Most breathing apps operate at a standard pace, often six breaths per minute, the same for everyone. But the rhythm at which your heart and breath resonate most strongly with each other—your personal resonant frequency—is different for everyone and typically lies between 4.5 and 6.5 breaths per minute. Practicing at the wrong pace means missing out on some of the benefits.

First, we find your rhythm.

A guided calibration determines your personal value. The front camera captures your pulse wave—no chest strap, no sensor, no accessories. We place particular emphasis on clean signal acquisition: The algorithm recognizes your breathing phase and selectively filters out interference. If a measurement doesn't show a clear result, the app tells you honestly—instead of feigning accuracy that isn't there.

A word of honesty: Breath Resonance - HRV Trainer doesn't measure clinical heart rate variability or display HRV metrics—a camera isn't sufficient for that, and we don't claim it does. What the app can reliably do is find the breathing rhythm at which your respiratory sinus arrhythmia—the natural oscillation of your heartbeat with your breath—is most pronounced. Your resonant point.

Then you breathe—with your eyes closed.

An audible pacer guides you in your exact rhythm, and a visual one is also available if desired. During the exercise, you don't look at any numbers; there's no live graph to monitor. Close your eyes, follow the sound. Some people fall asleep during it—a good sign.

Feel free to switch to airplane mode: Nothing will interrupt you, nothing will leave your device.

The method: Resonance frequency training according to Lehrer and Vaschillo, also known as coherent breathing or heart coherence—one of the best-researched breathing techniques and an established approach in stress management. It thrives on regularity; A few quiet minutes a day are all it takes.

No subscription. No ads. No account. No data collection—all measurements stay on your device. Buy once, use forever.

— For teenagers and adults. Not suitable for those with pacemakers or conditions that cause acidosis. If pregnant, with very low blood pressure, or prone to dizziness and fainting, please consult your doctor beforehand. Mother Earth Connector is not a medical device and does not replace medical diagnosis or treatment.