AutrefoisElf Smart Ring Gen 3 – Silver Health & Fitness Ring with Sleep, HR & SpO2 Tracking (Size 10)

The AutrefoisElf Smart Ring Gen 3 is a lightweight, waterproof biometric ring that continuously tracks heart rate, sleep stages, stress, steps and activity without any subscription fees.

Designed for everyday wear, this slim silver ring houses precise sensors and pairs with a free Android/iOS app to deliver actionable health and fitness insights. It’s IP68-rated for water resistance, supports 139+ sport modes, and offers multi-day battery life from a short charge. Before purchasing, measure your finger and consult the size chart to ensure accurate readings and a comfortable fit.

How does this ring monitor sleep and recovery?

The Gen 3 detects sleep automatically and breaks your night into light, deep and REM phases while recording wake periods. It combines those metrics into a readiness score to help you plan recovery and activity levels the next day.

• Automatic sleep detection and staging (light, deep, REM)
• Nightly readiness score based on sleep quality and recovery
• Sleep duration, interruptions and trend history in the free app

What health and activity data can I expect every day?

This ring continuously measures heart rate, blood oxygen and stress-related indicators while counting steps, distance and calories. It supports more than 139 sport modes so you can log workouts from running to yoga, and it also acts as a remote shutter for hands-free photos.

• 24/7 heart rate and SpO2 monitoring via high-precision sensors
• Step count, distance, calorie estimate and multi-sport logs
• Remote camera shutter and quick activity start from the ring

How durable is the ring and how long does the battery last?

The Gen 3 is built for daily use with an IP68 waterproof rating so you can wear it in the shower, pool and in the rain. A one-hour charge provides several days of active use; standby can last up to a week depending on settings.

• IP68 waterproof construction for swimming and showers
• Fast 1-hour charging for 3–5 days regular use (5–7 days standby)
• Lightweight metal finish designed for continuous wear and exercise

How do I pick the correct size and set it up?

Measure your finger circumference or use the included sizing kit to select an accurate size (available 6–14). Setup involves pairing the ring with the free AutrefoisElf app on Android or iOS—no subscription required to view your data.

• Sizes 6–14; measure before ordering for sensor accuracy
• Free companion app with no monthly fees for data access
• Simple Bluetooth pairing and guided calibration in-app

Who is this for: The AutrefoisElf Smart Ring Gen 3 suits anyone seeking a discreet daily wearable that blends sleep and recovery insights with fitness tracking—ideal for commuters, athletes, busy professionals, and people wanting continuous biometric feedback without ongoing subscription costs. If you value a low-profile form factor, waterproof durability and comprehensive metrics in a ring-sized device, this model is a practical option.