Titanium Ring — The Most Accurate Consumer Sleep Tracker, Invisible and Comfortable 24/7
A discreet, lightweight titanium ring with medical-grade sensors that's virtually invisible on your finger and comfortable enough to wear 24/7. Independent studies confirm 76–80% sleep staging sensitivity, consistently ranking it the most accurate consumer sleep tracker available. Water-resistant to 100 meters.
Research-Grade Sensors — HRV, SpO₂, Temperature, Respiratory Rate, All in a Ring
Advanced multi-wavelength PPG sensors (green, red, and infrared LEDs) continuously track heart rate, heart rate variability, blood oxygen saturation, skin temperature deviation, and respiratory rate. Temperature trends can detect illness onset up to 2 days before you feel symptoms.
5-8 Day Battery | Smart Charging Case | Bluetooth LE
Five to eight days of battery life with a full charge in 80 minutes. The premium charging case doubles as a portable battery for travel charging. Bluetooth Low Energy connectivity with automatic syncing to the Oura app on iOS and Android.
Three Daily Scores — Readiness, Sleep, Activity — $5.99/Month
A daily three-score system: Readiness (recovery based on HRV, resting heart rate, temperature, and sleep), Sleep (total time, efficiency, REM/deep, latency), and Activity (movement, training volume, recovery balance). Oura membership ($5.99/month) unlocks full analytics, long-term trends, and personalized guidance.
| Physical | |
| Weight | 4–6g (varies by size) |
| Thickness | 2.8mm at thickest point |
| Width | 7.9mm band — smooth, seamless interior |
| Battery | |
| Life | 5–8 days — full charge in 80 minutes |
| Charging | Premium charging case — doubles as portable battery for travel charging |
| Features | |
| Temperature | Illness detection — temperature trends detect onset up to 2 days before symptoms |
| Period Prediction | Cycle tracking with temperature-based ovulation detection |
| Compatibility | |
| OS | iOS 16+ / Android 10+ — Bluetooth LE auto-sync |
| Durability | |
| Water | 100m water resistance — shower, swim, dive safe |
| Scratch | PVD coating — scratch-resistant (Silver/Gold/Rose Gold), DLC (Stealth) |
| Sensors | |
| Health | SpO₂, skin temperature deviation (±0.1°C), respiratory rate |
| Activity | 3D accelerometer — steps, activity detection, automatic workout recognition |
| PPG | Multi-wavelength (green, red, infrared LEDs) — continuous heart rate, HRV |
| Sleep | |
| Accuracy | 76–80% sleep staging sensitivity in independent studies — most accurate consumer sleep tracker |
| Metrics | Total sleep, efficiency, REM, deep sleep, latency, timing, resting heart rate during sleep |
| Form | |
| Type | Titanium ring — available in 6–13 US ring sizes, Silver/Gold/Rose Gold/Stealth/Black finishes |
| Readiness | |
| Score | Daily Readiness — based on HRV, resting heart rate, body temperature, and previous night's sleep |
| Activity | |
| Score | Daily Activity — movement, training volume, recovery balance, inactivity alerts |
| Membership | |
| Required | $5.99/month for full analytics, trends, and personalized guidance |