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This is a lightweight smart ring with a stainless steel outer shell and a transparent resin inner casing. It tracks heart rate and blood oxygen around the clock, breaks sleep into stages with HRV and body temperature trends, and logs steps and workouts in a free app. It stands out by charging no subscription, which most rings in its class require for full insights. The trade-offs are a small sensor set and a 3–5 day battery that trails the week-plus of bigger-name rings. It suits someone who wants basic health tracking without a monthly fee.
Availability unknown
Lowest price we've seen: $49.99 on Nov 5 at Awessories. Tracked across 1 store since Nov 5.
This smart ring tracks heart rate, blood oxygen and sleep around the clock. It also records activity during sports such as running, cycling, yoga and hiking. The GH3018 sensor monitors continuous heart rate trends, resting heart rate, high heart rate alerts and blood oxygen levels.
The ring has a transparent resin inner casing and a stainless steel exterior. It is rated IPX8 waterproof for rain and sweat resistance. Its 25mAh battery lasts 3 to 5 days of active use or 7 to 9 days on standby, and it charges in about 30 minutes.
Sleep tracking covers sleep stages, timing, latency, efficiency, body temperature variations and HRV. The ring syncs with the free SmartHealth app on iOS and Android to show steps, distance, pace, calories and route mapping. The app has no subscription fees and works with Apple Health and WeChat Sports.
