AutrefoisElf Smart Ring Gen 3 Health & Fitness Tracker — Black, Size 12, Heart Rate & SpO2, IP68

The AutrefoisElf Smart Ring Gen 3 is a compact wearable that tracks heart rate, blood oxygen, sleep stages, stress and daily activity while syncing to a free app with no subscription.

This lightweight, IP68-rated smart ring is designed for round-the-clock wear: it records sleep patterns, continuous heart rate and SpO2, counts steps and calories, and supports over 139 sports modes. The device pairs with Android and iOS via the AutrefoisElf app so you can review trends, export data and use features like a remote camera shutter — all without monthly fees. Before purchasing, measure your finger and consult the included size chart or sizing kit for the best sensor accuracy and comfort.

How accurately does the ring monitor heart rate and blood oxygen?

The Gen 3 uses a dedicated optical sensor tuned for small-form-factor wearables to deliver continuous heart-rate readings and spot blood-oxygen (SpO2) measurements. Readings are suitable for daily wellness tracking and trend analysis rather than medical diagnostics. To improve accuracy, wear the ring snugly on your intended finger and sync regularly to the app.

• Continuous heart-rate logging throughout the day and during activities
• On-demand SpO2 readings and recorded spot checks
• Regular firmware updates via the free AutrefoisElf app

What sleep and recovery insights does this ring provide?

The ring automatically tracks total sleep time plus sleep stages — deep, light and REM — and records brief awakenings. It calculates a readiness or recovery score based on sleep quality and physiological data so you can plan rest or training intensity. All sleep sessions are viewable in the app with nightly score trends and actionable notes.

• Automatic sleep detection with stage breakdowns and wake events
• Nightly readiness score to guide activity and rest choices
• Exportable sleep summaries for long-term trend review

Can I use the ring for workouts and daily activity tracking?

Yes — the Gen 3 supports 139+ sports modes including running, cycling, yoga and swimming, and it records steps, distance and calorie burn. IP68 waterproofing allows use during showers, pool swims and rainy runs. The ring also doubles as a remote shutter for hands-free photos and quick controls for paired devices.

• Built-in step counter, distance estimate and calorie calculations
• Mode selection for more accurate exercise metrics across many sports
• Remote camera shutter and basic remote control features via Bluetooth

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

A fast 1-hour charge gives 3–5 days of active use and 5–7 days on standby, depending on which sensors and features you use. Charging is straightforward with the included cradle or cable; the app will notify you of low battery and remaining runtime. For consistent data capture, charge the ring during planned downtime like showers or short breaks.

• 1-hour charge time for typical daily use
• 3–5 days active battery life; 5–7 days standby
• Battery and firmware status visible in the AutrefoisElf app

Who is this for: The AutrefoisElf Smart Ring Gen 3 is aimed at people who want a discreet, all-day wearable that emphasizes sleep, recovery and basic fitness tracking without subscription costs. It suits runners, swimmers and busy professionals who prefer a minimal profile to a wristband, and anyone who values battery convenience and waterproof reliability. Make sure to measure your finger and choose the correct size for accurate sensor performance and comfortable daily wear.