Oura Ring 4 Black Size 11 - Smart Ring for 24/7 Health Tracking

Our review of the Oura Ring 4 Black, size 11, finds it best for people who want an unobtrusive, continuous health tracker focused on sleep and recovery. The single biggest reason to buy is its improved sensing platform that reliably tracks sleep stages, heart rate and readiness while remaining comfortable enough for 24/7 wear. This ring is not a replacement for a smartwatch but an alternative for anyone who prefers a low-profile wearable that lasts up to 8 days between charges and integrates with common health apps.

Key Features

• Smart Sensing: The new sensing platform adapts to your patterns and provides continuous data across over 50 health metrics including sleep, heart rate and stress.
• Size Before You Buy: Oura uses unique sizing so the included sizing kit is required to pick the best fit for accurate readings and comfortable all-day wear.
• Long Battery Life: With up to 8 days of battery life the ring can be worn through workouts and nights without frequent charging interruptions.
• All-Titanium Design: The first all-titanium Oura Ring combines durability and a lightweight feel so it is suitable for sensitive skin and daily use.
• App Integration: Syncs with iOS and Android and connects with more than 40 apps, letting you consolidate sleep and activity data into services like Apple Health and Strava.
• Membership Included: A first month of Oura membership is included for new members to access advanced insights, with subscription options thereafter.

Who It's For

The Oura Ring 4 suits people who prioritize discreet, accurate sleep and recovery tracking and want a device designed for continuous wear rather than a screen-first smartwatch. It is ideal for those who value build quality and a subtle look that does not draw attention.

It is less suitable for users who need on-device notifications or a conventional ring sizing system; because sizes are unique to Oura you must use the sizing kit before ordering. Also, those who prioritize scratch resistance as a top concern should be aware some users report cosmetic wear over time.

Pros & Cons

Pros

• Accurate tracking of sleep, heart rate and recovery thanks to Smart Sensing.
• Comfortable, water resistant all-titanium design that supports 24/7 wear.
• Long battery life lets you forget charging for up to eight days.
• Seamless syncing with many health apps and HSA/FSA compatibility for eligible purchases.

Cons

• Sizing is nonstandard so you must use the Sizing Kit for the best fit.
• Some customers report mixed experiences with long-term scratch resistance and occasional functionality differences.

Specifications

Product	Oura Ring 4 - Black
Size	Size 11 (unique Oura sizing)
Battery Life	Up to 8 days
Materials	All-titanium design
Metrics Tracked	50+ health metrics (sleep, readiness, activity, heart health, stress, womens health)
Compatibility	iOS and Android, integrates with 40+ apps
Membership	First month included for new members; subscription options available

Our Verdict

The Oura Ring 4 is a strong choice for anyone who wants a discreet, comfortable sleep and recovery tracker with reliable sensors and long battery life. It represents good value for users who will take the sizing kit step and who prefer passive, continuous monitoring over on-device alerts; those needs make it an effective complement to a smartphone-based health routine.

Frequently Asked Questions

Do I need the sizing kit?
Yes. Oura Ring 4 uses unique sizing that differs from standard US ring sizes, so the sizing kit is required to select the correct fit.

How long does the battery last?
The ring lasts up to 8 days between charges under typical use, allowing full days and nights of monitoring.

Is membership required?
New members get the first month included; ongoing access to advanced insights requires a subscription or prepaid annual option tied to your Oura account.