Oura Ring 4 Stealth Size 4 - Smart Ring for Sleep & Health

In this review the Oura Ring 4 in Stealth size 4 is examined as a dedicated health and sleep wearable for someone who wants continuous, discreet tracking without a bulky wrist device. The single biggest reason to consider it is the combination of an all-titanium, comfortable design and the new Smart Sensing platform that adapts to your physiology to deliver accurate insights across sleep, readiness, activity and heart health. Buyers should note sizing is unique to Oura and using the Sizing Kit before purchase is essential for the right fit and best data.

Key Features

• Smart Sensing: Adapts to your body to deliver more accurate, continuous readings across over 50 health metrics including sleep and heart health.
• All-titanium design: Provides a durable, lightweight ring that is comfortable for 24/7 wear and gentle for sensitive skin.
• Up to 8 days battery life: Lets you wear the ring through workouts, days out and nights of sleep without frequent charging.
• App integrations: Syncs with iOS and Android and integrates with over 40 apps such as Apple Health and Strava for consolidated tracking.
• Membership included: The first month of Oura membership is included for new members so you can access in-depth insights right away.

Who It's For

The Oura Ring 4 is best for people focused on improving sleep, recovery and long-term heart and readiness trends who prefer a low-profile wearable. It suits those who value comfort during day and night and who want a tracker that integrates with health and fitness apps.

It is not ideal for shoppers who prefer standard ring sizing without using a Sizing Kit, or those who want on-device screens or haptic feedback. If you need rugged outdoor-specific features or constant real-time on-screen readouts, a different wearable may be a better fit.

Pros & Cons

Pros

• Excellent sleep and recovery tracking thanks to the adaptive Smart Sensing platform.
• Sleek all-titanium construction that feels lighter than wrist wearables for continuous use.
• Long battery between charges so it stays on through multiple days and nights.
• Seamless app sync and broad integrations with health services.

Cons

• Size must be determined with the Oura Sizing Kit because Oura sizes differ from standard US ring sizes.
• Some customer feedback notes mixed experiences with battery life and long-term durability under heavy use.

Specifications

Model	Oura Ring 4 (Stealth)
Size	Size 4 (unique Oura sizing)
Materials	All-titanium shell
Battery Life	Up to 8 days
Metrics Tracked	Over 50 health metrics including sleep, heart rate, activity and womens health
Compatibility	iOS and Android, integrates with 40+ apps
Membership	First month included for new members; subscription thereafter

Our Verdict

The Oura Ring 4 is a strong choice for anyone prioritizing discreet, accurate sleep and recovery monitoring in a comfortable form factor; its Smart Sensing and titanium design justify the investment for long-term health tracking. Just be sure to size with the Oura Sizing Kit before buying and accept that some users report mixed battery or durability experiences.

Frequently Asked Questions

Do I need a membership to use the ring?
Basic use works with the Oura App, and the first month of membership is included for new members to access full insights; subscription continues after the trial.

Is the size the same as regular ring sizes?
No, Oura uses its own sizing system so you must size yourself with the official Oura Ring 4 Sizing Kit before purchase.

Can I wear it swimming or during workouts?
Yes, the ring is water resistant and designed for 24/7 wear, including workouts and sleep.