HRV readiness • stress-load tests • resonance breathing

A personal autonomic nervous system laboratory.

BioResonance helps you measure how your body responds to sleep, training, stress, breathwork, and competition preparation. HRV is the measurement — recovery, performance, sleep, and calm are the goal.

Get ready for launchRead the science guides
Recover fasterReduce stressPrepare to perform
BioResonance readiness result with explainable HRV scoreLive HRV breathing lab
Recover fasterSpot when your body is ready to absorb load.
Reduce stressPractice down-regulation with live biofeedback.
Improve sleepSee how habits show up in morning recovery.
Increase performancePlan hard sessions around your baseline.
Reduce anxietyBuild a self-regulation routine with a signal.

Morning readiness

Know if today is a push day, steady day, or recovery day.

BioResonance turns a quiet 3-minute test into an explainable readiness score. Instead of a black box, you see recovery, stress load, nervous-system balance, live heart rate, and advanced HRV metrics when you want them.

  • Score shown as a clear fraction, e.g. 74 / 100
  • Three human-readable reasons behind the score
  • Recovery, Stress Load, and Nervous System Balance cards
  • Advanced HRV metrics hidden until expanded
Readiness score with recovery stress load and nervous system balance
Resonance breathing test across slow breathing rates

Resonance breathing engine

Find your body’s actual resonance rate — not a generic 6 BPM timer.

The app tests slow breathing rates from 6.5 down to 4.5 breaths per minute and measures how strongly your heart rhythm responds. Your optimal pace can shift with fatigue, posture, hydration, stress, and illness risk — so BioResonance treats resonance as a living daily signal.

6.56.05.55.04.5breaths/min sweep
  • RMSSD and SD1 response
  • RSA amplitude and HR oscillation amplitude
  • Phase synchrony, coherence, and RSA gain
  • Daily estimate of your best resonance pace

HRV biofeedback training

Train the signal you just measured.

Once you know your approximate resonance pace, practice with a clean breathing pacer and live HRV feedback. The aim is not to breathe harder — it is to breathe smoothly enough that your heart rhythm forms a stable wave.

  • Live heart rate and signal quality
  • Coherence and breath-synchrony feedback
  • Training history and progress trends
  • Swipe away weird sessions so outliers do not pollute your picture
BioResonance breathing training pacer and live HRV feedback

Science-forward, readable by humans and AI

Transparent concepts. Careful claims. Useful decisions.

HRV readiness

Compare today to your own baseline. Trends matter more than one isolated reading.

Stress-load testing

Heart rate, RMSSD, PNS/SNS indexes, and signal quality give context for recovery.

Baroreflex + RSA

Resonance breathing amplifies respiratory sinus arrhythmia through the cardiovascular baroreflex loop.

No medical hype

Wellness and performance education, not diagnosis or treatment.

Deep guides

Professional HRV education for readiness, stress, and resonance breathing.

Long-form pages are built for readers, Google, and AI answer engines: clear headings, citations, summaries, FAQs, and schema markup.

What can a readiness test tell you?Using HRV before a hard training dayThe current state of HRV researchScience-backed resonance breathing trainingHow the resonance breathing test works

Launch pricing

Start with 14 days free. Choose monthly, yearly, or lifetime.

Built for athletes, coaches, breathwork practitioners, and anyone who wants to understand the nervous system behind recovery, stress, sleep, and performance. A compatible Bluetooth RR sensor is required for sensor-based tests and training.

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Monthly€3.99

14 days free, then €3.99/month. Best if you want to test the full HRV lab before committing.

Yearly€29.99

Best value. One year of readiness testing, resonance breathing, training history, and Apple Health export.

Lifetime€89.99

One-time purchase. Pay once and keep BioResonance access without a subscription.