Oura Ring 4 - Gold Size 5 Smart Ring - Sleep & Health Tracker

In this review the Oura Ring 4 is presented as a deliberately discreet, all-titanium wearable for people who want continuous sleep and health insights without a wrist display. The biggest reason to buy is its focused biometric tracking: powered by Smart Sensing, it monitors over 50 health metrics including sleep, readiness, heart health and women's health while lasting up to eight days on a single charge. It is best for users willing to size carefully and who prefer a low-profile, 24/7 tracker that integrates with popular health apps.

Key Features

• Unique sizing: Size yourself with the Oura Ring 4 Sizing Kit so you get a comfortable fit and accurate readings, since sizes differ from standard ring scales.
• Smart Sensing accuracy: The ring adapts to your body and delivers continuous, detailed metrics across sleep, activity, stress and heart health for clearer trends over time.
• All-titanium design: A durable yet gentle metal construction makes the ring suitable for 24/7 wear and resistant to daily wear and water exposure.
• Battery life: Up to eight days of usage between charges lets users wear it through workouts and nights without frequent recharging interruptions.
• App and integrations: Seamless syncing with iOS and Android plus compatibility with Apple Health, Google Health Connect, Strava and fertility apps expands where your data can live.
• Membership included: New buyers get the first month of Oura membership free, with subscription options thereafter for ongoing data insights and guidance.

Who It's For

The Oura Ring 4 is ideal for people prioritizing sleep and recovery data who want a discreet ring instead of a wrist device; athletes and biohackers who value continuous heart and readiness metrics will appreciate the depth of data. It also suits users who want long battery life and a durable, comfortable metal form factor for round-the-clock wear.

It is less suitable for buyers who prefer an on-device screen, haptic alerts, or who cannot or will not use the Sizing Kit ahead of purchase; those expecting standard US ring sizing should size carefully or consider other wearables that use standard sizing options.

Pros & Cons

Pros

• Discreet, comfortable all-titanium design meant for 24/7 wear and water resistance.
• Broad, accurate tracking through Smart Sensing with over 50 health metrics including sleep and heart health.
• Long battery life of up to eight days reduces interruption to daily use and sleep tracking.
• Good app ecosystem and integrations for syncing data across services.

Cons

• Size must be determined with the Sizing Kit since Oura sizes are not standard US ring sizes, adding a step before purchase.
• Some customer feedback shows mixed experiences with battery life and occasional concerns about long-term durability.

Specifications

Brand	OURA
Model	Oura Ring 4
Finish	Gold
Size	Size 5 (unique sizing, not standard US)
Battery life	Up to 8 days
Sensors / Metrics	Smart Sensing platform; tracks 50+ health metrics (sleep, heart, activity, stress, womens health)
Compatibility	iOS and Android; integrates with Apple Health, Google Health Connect, Strava and more

Our Verdict

The Oura Ring 4 is a strong choice for anyone who wants an unobtrusive, data-rich sleep and health tracker in a refined metal form. With Smart Sensing, long battery life and broad app integration it offers excellent long-term value for users willing to size correctly and who do not need on-device screens or vibrations.

Frequently Asked Questions

Do I need the Sizing Kit?
Yes. Oura Ring 4 sizing differs from standard US ring sizes, so the Sizing Kit is necessary to find the correct fit for accurate tracking.

How long does the battery last?
Oura rates the Ring 4 for up to eight days of battery life depending on usage, allowing for extended continuous wear between charges.

Is membership required?
New buyers get the first month included; ongoing access to full insights requires an Oura membership which is optional but available monthly or annually.