Smart ring Ultrahuman Ring AIR — sleep & fitness tracker, Titanium, Size 8, up to 6 days battery

The Ultrahuman Ring AIR is a compact smart ring for men and women that monitors sleep, recovery and daily activity. Built with a round titanium body and a lightweight design, it collects fingertip biomarker data to deliver detailed insights into sleep stages, heart rate variability (HRV), skin temperature and overall wellness. The ring connects via Bluetooth, charges with a USB‑C to USB‑C cable and offers up to six days of battery life on a 24 mAh Li‑Po cell.

Advantages

Fingertip sensing provides higher-precision readings than typical wrist-worn devices, improving accuracy for sleep and recovery metrics. At approximately 2.4 grams and with a hypoallergenic inner lining, the titanium ring is comfortable to wear day and night while remaining durable. The device combines continuous physiological monitoring with dynamic recovery scoring and everyday sleep insights to help you make informed decisions about rest and training.

Suitable for

• People who want detailed sleep stage tracking and daily sleep scores
• Users seeking recovery and HRV insights for training or stress management
• Anyone preferring a low-profile, lightweight wearable instead of a wrist device
• Android (8–13) and iOS (15–16) smartphone users who need Bluetooth connectivity

When it may not be suitable

This ring may not be appropriate for users requiring continuous on-screen interaction or smartwatch-style notifications, as it is focused on passive physiological monitoring rather than a full-featured smartwatch interface. It may also be unsuitable for people who cannot wear rings for medical or comfort reasons, or for those who need compatibility with older or unsupported mobile OS versions.

Key specifications

• Form factor: round titanium smart ring
• Weight: approximately 2.4 grams
• Battery: 24 mAh Li‑Po, up to 6 days typical use
• Connectivity: Bluetooth
• Sensors and metrics: heart rate, heart rate variability (HRV), skin temperature, sleep stage detection, activity tracking (pedometer, active minutes)
• Charging: USB‑C to USB‑C cable
• Compatible OS: Android 8–13, iOS 15–16

How to use

Fit the ring on the finger sized to the device (size 8 in this listing) and pair it with the Ultrahuman app on a compatible smartphone via Bluetooth. Wear the ring continuously, including during sleep, to collect uninterrupted biometric data. Charge the ring using the supplied USB‑C cable when battery levels are low; a full charge provides up to six days of typical use. Review daily sleep scores, recovery metrics and activity summaries in the app to guide rest, training and lifestyle choices.

What to consider before purchase

• Confirm the correct ring size for comfortable, consistent sensor contact
• Ensure your smartphone runs a supported OS version (Android 8–13 or iOS 15–16)
• Be aware that the device focuses on passive health monitoring rather than smartwatch features
• Check for any skin sensitivities to metals despite the hypoallergenic lining

Usage recommendations

Wear the Ultrahuman Ring AIR continuously, including overnight, for the most accurate sleep and recovery insights. Keep the ring’s contact surface clean and maintain a snug but comfortable fit; charge regularly to avoid gaps in data collection.