Oura Ring 4 Brushed Silver (Size 9) — Smart Ring for Sleep & Activity Tracking

What people love (and don’t love)

What people love

Accurate and detailed health tracking including sleep, activity, heart rate, and body temperature.
Lightweight, comfortable, and stylish design with minimal bulk.
Long battery life lasting up to 8 days and quick charging feature.
Intuitive, easy-to-use companion app providing insightful health data and trends.
Durable with scratch-resistant coating and suitable for everyday wear.
Helpful for monitoring stress, menstrual cycles, and overall wellness patterns.

What people don’t love

High price point relative to other fitness trackers.
Battery life can deteriorate after extended use (around 10 months), leading to performance issues.
Some users experienced connectivity and data syncing problems.
Fit and comfort highly dependent on accurate sizing; ring sizer may be inconsistent.
Subscription fee for some features might be a drawback for certain buyers.

A premium smart ring offering precise health monitoring with great comfort, but at a steep price and potential long-term battery concerns.

Summary based on customer review evidence.

Check price on Amazon

Quick facts

Brand: OURA
Price: USD 399.00
Rating: 4.10 (8174 reviews)

The Oura Ring 4 is a minimalist smart ring designed for people who want continuous tracking without a screen, buzzes, or distractions. In this Brushed Silver Size 9 version, Oura focuses on comfort for 24/7 wear while capturing data day and night via Smart Sensing.

You can view the current price and full details on Amazon here.

It tracks over 50 health metrics across sleep, activity, stress, heart health, and women’s health metrics, then syncs to the Oura App on iOS or Android. It also integrates with 40+ apps—useful if you already rely on platforms like Apple Health, Google Health Connect, Strava, Natural Cycles, or Flo.

Important: Oura Ring 4 uses unique sizing that differs from standard jewelry. To avoid fit issues, use the Oura Ring 4 Sizing Kit before purchasing. Your purchase includes the first month of Oura Membership for new members (subscription required after the first month).

Unique Oura Ring 4 sizing—use the Oura sizing kit to confirm your fit before buying
Tracks 50+ health metrics including sleep, activity, stress, heart health, and women’s health metrics
Smart Sensing adapts to you for continuous, day-and-night data
Up to 8 days of battery life, with no display, no vibrations, and no screens
Designed for 24/7 wear and water resistant for everyday use
Bluetooth connectivity; works with iOS and Android and integrates with 40+ apps
HSA/FSA eligible for the ring, additional chargers, and shipping (where applicable)

In the box you’ll get the Oura Ring 4, charger, USB cable, and setup materials—so you can start syncing and exploring your insights quickly.