OURA Ring 4 Smart Ring 15 — Sleep and HR tracker

This smart ring tracks sleep, heart rate and daily activity while remaining compact and unobtrusive for all-day wear. It pairs sensor-driven monitoring with a lightweight titanium body to support sleep analysis, recovery insight and trend tracking for users who want a low-profile health tracker. The product also helps with sizing before purchase by offering a sizing kit and a redeemable voucher.

Key Points

The ring includes precise night and day monitoring that covers sleep stages, resting heart rate and activity levels, using what the brand refers to as Smart Sensing. It is made from titanium for durability and a smooth finish that suits sensitive skin. The package offers a Size First ring sizing kit to confirm fit before buying, and there is a subscription tied to the companion app with the first month free for new users and ongoing plans available, according to the manufacturer. 🔍

This model keeps distractions to a minimum by having no screens or vibrations, allowing users to focus on daily life while the device records metrics automatically. For people who prefer subtle wearables, the ring is designed to be comfortable for continuous 24/7 use and to withstand contact with water.

Technical Specifications

• Name: OURA Ring 4
• Colour: Black
• Size: 15
• Material: Titanium
• Battery life: up to 8 days (listing) and up to seven days according to the manufacturer
• Sensors and tracking: sleep, activity, heart rate, stress indicators, menstrual cycle and other vital signs

Usage Recommendations

Wear the ring on your usual finger and keep it on overnight to capture full sleep-cycle data and morning recovery metrics. Charge the ring periodically to maintain the stated battery duration, and sync with the mobile application to view trends and detailed reports. For best fit, use the sizing kit before selecting the final ring size to avoid issues with comfort or accuracy. 🔄

Consider that the subscription is linked to the app rather than the ring itself, with a monthly fee after the trial period and an annual option also shown by the manufacturer. The ring’s lack of a display means all detailed feedback appears in the app, so access to a compatible smartphone is necessary for full functionality. 🛠️