RHz Biofeedback

Find the breathing rate that works best for your body.

Most breathing apps use a generic pace like 6 breaths per minute. RHz helps you discover your personal resonance frequency using real HRV biofeedback.

RHz is an Android app for resonance breathing and HRV training. Connect a compatible Bluetooth heart rate monitor, run a guided sweep, and practice at the breathing pace where your HRV response is strongest.

WHAT YOU CAN DO

• Find your personal resonance frequency
• Run guided full or quick sweeps
• Use adaptive mode during practice
• View live RMSSD, SDNN, and beat-to-beat data
• Track session history and trends
• Keep all data stored locally on your device

WHY PEOPLE USE RHZ

• More precise than fixed breathing timers
• Built for real HRV biofeedback practice
• Useful for recovery, stress regulation, and breathing training
• No account, no cloud, no biometric data upload

HARDWARE REQUIRED

RHz requires a compatible Bluetooth heart rate monitor.

Recommended:
• Polar H10 and other ECG chest straps for best HRV accuracy

Also supported:
• Whoop 5.0 and other high-quality PPG sensors

Some smartwatches may connect over Bluetooth, but HRV quality can vary by device.

RHz is a wellness app for breathing practice and HRV biofeedback. It is not intended to diagnose, treat, cure, or prevent any medical condition.