Smart ring Ultrahuman Ring AIR — sleep and fitness tracker, Size 6, Gold, PPG SpO2, up to 6 days battery

The Ultrahuman Ring AIR is a compact smart ring designed for continuous sleep and fitness monitoring. In a gold round form factor (size 6) it measures heart rate, blood oxygen (PPG SpO2), activity, recovery and a wide range of biometrics to help you track sleep stages, stress, workouts and overall recovery. The ring is made from space‑grade titanium, is water‑resistant to 100 m and offers up to 6 days of battery life with wireless charging. Standard features are available in the Ultrahuman app without a subscription.

Advantages

Ultrahuman Ring AIR combines a minimal, durable titanium design with multi‑biomarker sensing: PPG heart rate, SpO2, skin temperature and HRV to provide detailed sleep staging, stress rhythm scoring, activity and recovery insights. The ring’s long battery life, water resistance and lightweight profile make it suitable for continuous wear and exercise monitoring. Women’s health features include cycle, ovulation and pregnancy tracking driven by biomarker data, and several optional PowerPlugs let you focus on specific metrics such as cardio adaptability, screen time or caffeine impact.

Suitable for

• Daily sleep monitoring and detailed sleep stage analysis (REM, Deep, Light, Wakefulness)
• Fitness tracking: steps, active minutes, workouts, calories and distance
• Recovery and stress tracking using HR, HRV and skin temperature
• Women tracking cycles, ovulation window prediction and pregnancy mode
• Users who want basic app features without a recurring subscription

When it may not be suitable

The Ultrahuman Ring AIR is not a medical device and should not replace professional medical diagnostics or treatments. It may not meet needs of users who require clinical‑grade measurements or specialized sensors beyond the listed biometrics.

Key specifications

• Form factor: round smart ring, gold finish, size 6
• Materials: space‑grade titanium with hypoallergenic inner shell
• Sensors: PPG heart rate, SpO2 (blood oxygen), skin temperature, HRV
• Battery: 24 mAh LiPo, up to 6 days typical use, wireless charging
• Dimensions: approx. 8.1 mm width, 2.45 mm thickness
• Connectivity: Bluetooth 5.0; compatible with Android 6.0–13.0
• Water resistance: up to 100 m

How to use

First, determine your correct ring size using the Ultrahuman Sizing Kit because ring sizes differ from standard jewelry sizes. Charge the ring and pair it with the Ultrahuman app over Bluetooth. Wear the ring continuously for best results—overnight for sleep insights and during activity for workout, step and recovery tracking. Use the app to view sleep stages, stress rhythm score, activity summaries and women’s health insights; enable or configure PowerPlugs for additional focused metrics.

What to consider before purchase

• Buy the Ultrahuman Sizing Kit first to ensure correct sizing and to avoid returns or exchanges
• Not a medical device—intended for wellness and fitness insights rather than clinical diagnostics
• Ensure your smartphone meets compatibility requirements (Android 6.0–13.0)
• Decide if you need specific PowerPlugs for additional metric tracking

Usage recommendations

For accurate long‑term insights, wear the ring continuously and charge it on its wireless charger every few days. Use the sizing kit before ordering to ensure a snug, comfortable fit that preserves sensor contact and data accuracy.