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.