Oura Ring 4 Stealth Size 13 - Smart Ring for Sleep & Recovery

Our review of the Oura Ring 4 Stealth (Size 13) finds it best suited to people who want a discreet, all-day health tracker that focuses on sleep and recovery. The single biggest reason to buy is its improved sensing platform and comfortable all-titanium design that lets users wear it 24/7 without a screen or vibration interrupting daily life. The inclusion of a Sizing Kit option and the first month of Oura membership for new subscribers make initial setup straightforward, although membership continues as a paid plan after the trial.

Key Features

• Smart Sensing: Adapts to your signals and provides insights across more than 50 health metrics so you can track sleep, readiness, and stress with continuous data.
• All-titanium design: Offers improved durability and a lightweight feel that is comfortable for all-day and night wear, including for sensitive skin.
• Long battery life: Up to 8 days of battery life means less frequent charging and more continuous tracking through workouts and sleep.
• Size before you buy: The Sizing Kit removes guesswork so you can select the correct Size 13 ring for a reliable fit and accurate readings.
• App and integrations: Syncs with iOS and Android and integrates with many apps including Apple Health and Strava for consolidated health data.
• HSA/FSA eligible purchases: Eligible for payment with HSA or FSA funds for the ring, additional chargers, and shipping when applicable.

Who It's For

The Oura Ring 4 is ideal for people who prioritize sleep and recovery tracking and prefer a subtle wearable without a screen. It works well for users who want continuous heart rate, readiness, and stress metrics in a compact form and who will appreciate the multi-ring support to change finishes.

It may be less suitable for those who need a smartwatch with on-wrist notifications, apps, or tactile alerts. Also, buyers should be prepared for a subscription after the free month if they want ongoing membership features and for occasional mixed reports on battery longevity in real-world use.

Pros & Cons

Pros

• Excellent sleep tracking and heart rate monitoring with Smart Sensing for detailed overnight insights.
• Comfortable, water resistant all-titanium build designed for continuous wear.
• Multi-day battery life reduces charging interruptions and supports hands-off tracking.
• Sizing Kit helps ensure the correct fit and better accuracy before committing to a ring.

Cons

• Some users report inconsistent battery performance over time, so real-world longevity can vary.
• Subscription required for ongoing membership features after the initial free month.

Specifications

Model	Oura Ring 4 - Stealth
Size	Size 13 (use Sizing Kit)
Materials	All-titanium shell
Battery life	Up to 8 days
Metrics tracked	50+ health metrics including sleep, activity, readiness, heart health, stress, womens health
Compatibility	iOS and Android, integrates with 40+ apps
Membership	First month included for new members; then subscription applies

Our Verdict

The Oura Ring 4 Stealth Size 13 is a strong choice for anyone focused on sleep, recovery, and unobtrusive health tracking; its Smart Sensing and comfortable titanium design deliver meaningful insights with minimal fuss. Despite a required subscription after the trial and some mixed reports on battery life, it offers good value for users who prefer a discreet, durable wearable that syncs with major health apps.

Frequently Asked Questions

Do I need the Sizing Kit?
The Sizing Kit is recommended because Oura sizes differ from standard ring sizes and it helps ensure accurate fit and sensor readings.

Is a subscription required?
New members get the first month free; ongoing membership features require a paid subscription after the trial.

Can I wear it all the time?
Yes, the ring is designed for 24/7 wear with water resistance and a comfortable titanium build for continuous tracking.