AutrefoisElf Smart Ring Gen 3 - Gold Fitness & Health Ring (Size 8) with Sleep, HR & SpO2 Tracking, IP68

The AutrefoisElf Smart Ring Gen 3 is a compact wearable ring that monitors sleep, stress, heart rate, SpO2 and activity while syncing to a free app with no subscription.

This slim gold smart ring combines continuous biometric sensing and activity tracking in a water-resistant form factor designed for everyday wear. It houses a high-precision sensor suite that records heart rate, blood oxygen, steps and detailed sleep stages; data flows to the companion Android/iOS app so you can check patterns and readiness without paying monthly fees. Available in sizes 6–14, the Gen 3 focuses on comfort, battery efficiency and multi-sport support for both men and women.

How accurate are the health and sleep readings?

The Gen 3 uses advanced optical sensors and algorithms to estimate heart rate, blood oxygen and stress markers continuously. Sleep is automatically tracked with stage breakdowns (deep, light, REM, awake) and a daily readiness score derived from recovery metrics. While not a clinical device, the ring offers actionable trends and nightly comparisons to help you spot changes.

• Continuous optical heart-rate monitoring and SpO2 estimates
• Automatic sleep stage detection and duration tracking
• Daily readiness score based on sleep and recovery
• No subscription required — view data in the free app

Will the ring handle workouts and water exposure?

The AutrefoisElf ring supports 139+ sport modes, from running and cycling to yoga and open-water swimming. It records steps, distance and calories, and can act as a remote shutter for your phone camera during hands-free activity shots. With IP68 waterproofing you can shower or swim without removing the ring.

• 139+ sports modes including swimming-compatible tracking
• Step, distance and calorie calculations for daily activity
• Remote phone shutter for hands-free photos and videos
• IP68 rating — suitable for showers, swimming and rain

How long does the battery last and how do I charge it?

Charging is quick and straightforward: one hour on the included charger provides several days of active use. Typical active use runs 3–5 days with normal monitoring; standby can reach 5–7 days depending on settings. The compact charger docks the ring securely for fast recharging.

• About 1 hour to fully charge
• 3–5 days typical active use; 5–7 days standby
• Magnetic/clip charging dock for secure contact

How do I choose the right size and get the best fit?

Measure your finger circumference and consult the AutrefoisElf size chart before ordering to ensure a snug, reliable fit. The brand recommends using a sizing kit for precision, which helps sensors sit correctly against skin for better readings. Sizes range from 6 to 14 to accommodate most fingers.

• Measure finger circumference before purchase
• Use the sizing kit for the most accurate fit
• Sizes 6 through 14 available for men and women

Who is this for? The AutrefoisElf Smart Ring Gen 3 is aimed at people who want continuous health and sleep insights in a low-profile wearable: fitness-minded users, frequent travelers, and anyone preferring ring-style wearables over wrist devices. It’s well suited for those who value water resistance, a free app (no subscription), and compact hardware that blends with everyday jewelry. If you need clinical-grade diagnostics, consult a healthcare professional; for trend-based monitoring and convenience-focused tracking, this ring offers a strong balance of features.