Smartwatches are noisy. The Oura Ring Gen 4 is quiet—and that’s precisely why it’s winning. This fourth-generation ring tracks sleep stages, HRV, temperature, and readiness with clinical accuracy.
Why It Beats Wrist Devices
With FDA-cleared sleep staging and ±1.2 bpm heart rate accuracy (vs ±4.7 bpm for typical wrist devices), the ring captures data 24/7 without sleep disruption.
Key Features
- FDA-cleared sleep staging
- Continuous core body temperature tracking
- Menstrual cycle prediction (validated)
- 7-day battery life
- Sapphire glass, titanium construction
The Catch
Requires a $6/month subscription for full features. Healthcare professionals can access the discount program.
Verdict
Best passive health tracker available. The subscription adds up but the data quality justifies it for serious health optimization.