Oura Ring 4 - Silver, Size 12 | AI Advisor, Sleep & Activity Insights | Up to 8 Days Battery | Size Before You Buy | Android & iOS

Overview

Meet Oura Ring 4, the latest evolution of the smart ring family. Built with a lightweight all-titanium design, it feels almost invisible as you wear it, yet it quietly gathers signals to support your daily routines. The ring pairs a refined form with Smart Sensing, a sensing platform designed to adapt to you and deliver continuous data around the clock.

50+ metrics, smart sensing, and AI-advisor insights

Oura Ring 4 tracks more than 50 health indicators across sleep, readiness, activity, heart health, stress, metabolic signals, and women’s health metrics. The data appears in a clear companion app and is designed to feel relevant to your day-to-day life. The adaptive sensing is tuned to your unique rhythm, so readings stay meaningful whether you’re winding down after a long day or pushing through a workout.

In addition, an AI-powered advisor in the app helps translate patterns into practical possibilities, without guaranteeing specific outcomes. This is about awareness and options, not promises.

Battery life, wearability, and real-life use

With up to eight days of battery life and a minimal, screen-free design, you can wear the ring from morning to night without constant charging. The all-titanium construction provides a premium yet durable feel, and the light weight helps it disappear under everyday sleeves, gloves, or jackets. Whether you’re tracking a new routine or traveling, the ring aims to stay in the background while gathering reliable data.

• Long battery life reduces the need for daily charging and keeps data flowing.
• Sleek, durable titanium shell is comfortable for all-day wear.
• Smart Sensing adapts to your routine for meaningful, continuous data.

Fit, style, and app-driven customization

Precise fit matters for accurate readings, so Oura offers a sizing kit to help you confirm your perfect fit before buying. The ring supports multiple finishes, enabling easy style swaps in the Oura App when you own more than one style.

• Unique sizing Kit helps you find the best fit before you commit.
• Multi-ring support lets you switch finishes via the app for a coordinated look.

Membership, compatibility, and eligibility

With your purchase, the first month of Oura Membership is included for new members. After that, ongoing access is through a monthly subscription. The ring works with Android and iOS devices, syncing through the Oura app for cross-device use. It is also eligible for HSA or FSA funds in the US for the ring and select accessories.

What this means for you

Oura Ring 4 is designed to blend with your everyday rhythm, offering insights you can consider at your own pace. It’s about understanding patterns and exploring gentle, sustainable adjustments—without making guarantees or promises. If you’re curious about how sleep, activity, readiness, and menstrual health trends relate to your day, this ring provides a data-informed perspective you can act on.