Try adjusting your filter to find what you're looking for
The Oura ring performed near-perfect for resting heart rate (r² = 0.996) and extremely high for heart rate variability (r² = 0.980) when compared to a medical-grade ECG device.
Compared to medical grade ECG, Oura was found to have 99.9% reliability for Resting Heart Rate and 98.4% reliability for Heart Rate Variability.
Read more about Oura's EMF safety readings and Bluetooth capabilities.
The Finnish Occupational Health Institute has validated the Oura Ring against the gold standard sleep laboratory test—polysomnography (PSG).