Oura Ring 5 vs Oura Ring 4: Which Smart Ring Is Right for You?
Oura Ring 5 vs Oura Ring 4 compares Oura’s newest smart ring with the previous generation across design, comfort, sensors, health tracking, sleep, activity, battery life, charging, app features and membership. Oura Ring 5 is 40% smaller by volume, starts from 2 g, lasts typically 6–9 days and uses a redesigned sensing architecture. Oura Ring 4 remains a full-titanium smart ring with Smart Sensing, 5–8 day battery life and the same core Oura health software when paired with an active Oura Membership.
Oura Ring 5
Oura’s smallest smart ring, with a 40% smaller design, redesigned sensing architecture, 6–9 day battery life and more compact dimensions.
Oura Ring 4
Full-titanium smart ring with Smart Sensing, recessed interior sensors, 5–8 day battery life and Oura’s established health-tracking platform.
Oura Ring 5 vs Oura Ring 4: Quick Verdict
Best for the smallest design, longer battery range and newest hardware
Oura Ring 5 is 6.09 mm wide and 2.28 mm thick, starts from 2 g and is rated for 6–9 days of battery life. Oura also describes it as its most accurate generation yet.
Best for broader sizing and a lower official starting price
Oura Ring 4 supports sizes 4–15, compared with 6–13 for Ring 5, while retaining the same core Oura software features with active membership.
The biggest differences are hardware-related: Ring 5 is substantially smaller and lighter, has a 6–9 day battery rating and a redesigned sensor architecture. Oura states that Ring 5 with active membership includes the same core software features found on Ring 4.
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Oura Ring 5 vs Oura Ring 4: Comparison Overview
The Oura Ring 5 vs Oura Ring 4 comparison is primarily a hardware-generation decision. Both rings work with the Oura App and, with an active Oura Membership, provide detailed sleep analysis, 24/7 heart-rate tracking, temperature trends, blood oxygen sensing, Daytime Stress, automatic activity detection, cardiovascular insights, women’s health features and long-term reports.
Oura Ring 5 is the more radical redesign. Oura says it has 40% less volume than Oura Ring 4, measures 6.09 mm wide and 2.28 mm thick, starts from 2 grams and delivers typically 6–9 days of battery life. Its sensing architecture uses two photodetectors, two triple LEDs, a digital temperature sensor and an accelerometer.
Oura Ring 4 remains a capable alternative. It measures 7.9 mm wide and about 2.88 mm thick, weighs 3.3–5.2 g depending on size and is rated for 5–8 days. It also has a wider size range, from 4 to 15, whereas Ring 5 is offered in sizes 6 to 13.
Oura Ring 5 vs Oura Ring 4: Key Specifications
The table below summarizes specifications published by Oura for Ring 5 and Ring 4.
| Feature | Oura Ring 5 | Oura Ring 4 |
|---|---|---|
| Material | Full titanium exterior and interior | Full titanium exterior and interior |
| Width | 6.09 mm | 7.9 mm |
| Thickness | 2.28 mm | Approx. 2.88 mm |
| Weight | From 2 g, depending on size | 3.3–5.2 g, depending on size |
| Available sizes | 6–13 | 4–15 |
| Battery life | Typically 6–9 days | Typically 5–8 days |
| Charging time | About 80 minutes | Typically 20–80 minutes |
| Water resistance | 100 m / 328 ft, IP68 | 100 m / 328 ft |
| Photodetectors | 2 | 3 |
| LED system | 2 × triple LEDs: red, green, IR | 2 × triple LEDs: red, green, IR |
| Temperature sensor | Yes | Yes |
| Accelerometer | Yes | Yes |
| On-ring data storage | Up to 3 days | Up to 7 days |
Ring 5 is substantially narrower and thinner, but Ring 4’s size 4–15 range and up-to-seven-day memory can still matter for specific users.
Oura Ring 5 vs Oura Ring 4: Design, Size & Comfort
Design is one of the clearest advantages for Oura Ring 5. Oura describes Ring 5 as the world’s smallest smart ring and says it has 40% less volume than Oura Ring 4. At 6.09 mm wide and 2.28 mm thick, it is more compact on paper than Ring 4 at 7.9 mm wide and approximately 2.88 mm thick.
Both standard models use titanium inside and out. Oura Ring 5 applies a superhard PVD coating across all six finishes: Black, Silver, Stealth, Brushed Silver, Gold and Deep Rose. Oura Ring 4 uses PVD or DLC coating depending on finish. Oura Ring 5 is offered in sizes 6–13, while Ring 4 covers sizes 4–15.
Smaller and lighter redesign
- 6.09 mm width
- 2.28 mm thickness
- From 2 g
- Sizes 6–13
- Six titanium finishes
- 100 m water resistance
Wider sizing range
- 7.9 mm width
- Approx. 2.88 mm thickness
- 3.3–5.2 g
- Sizes 4–15
- Full titanium design
- 100 m water resistance
Its 40% smaller volume, thinner profile and lower starting weight make Ring 5 the stronger choice for discreet 24/7 wear, provided its size range fits.
Oura Ring 5 vs Oura Ring 4: Health, Heart & Wellness Tracking
For software-based health tracking, the difference is smaller than the hardware redesign suggests. Oura states that Oura Ring 5 with active membership includes all of the same features found on Oura Ring 4. That includes detailed sleep analysis, 24/7 heart-rate tracking, advanced temperature monitoring, blood oxygen sensing, Daytime Stress, automatic activity detection and cardiovascular tools such as Cardiovascular Age and Cardio Capacity.
Sleep
Both generations provide detailed sleep analysis and Sleep Score insights through the Oura App with active membership.
Readiness
Oura combines sleep and physiological signals into personalized readiness guidance.
Heart Health
Both support 24/7 heart-rate tracking and cardiovascular features including Cardiovascular Age and Cardio Capacity.
Women’s Health
Oura lists Cycle Insights and Pregnancy Insights among membership features supported on both generations.
The reason to upgrade to Ring 5 is primarily its newer physical design, sensing architecture and battery improvements rather than an exclusive set of core health features.
Oura Ring 5 vs Oura Ring 4: Sensors, Accuracy & Smart Sensing
Oura Ring 5 uses a redesigned sensing architecture with two photodetectors, two triple LEDs covering red, green and infrared wavelengths, a digital temperature sensor and an accelerometer. Oura says low-profile sensor domes improve skin contact and that 12 signal pathways help deliver more consistent readings across finger types and skin tones.
Oura Ring 4 uses three photodetectors, two triple LEDs, a digital temperature sensor and an accelerometer. Its Smart Sensing platform dynamically selects signal paths based on the finger, skin tone and activity. Oura Ring 5 uses fewer photodetectors, but Oura explicitly positions it as its most accurate generation yet.
Ring 5 improves the architecture, but Ring 4 stores more data locally
Oura Ring 5 can store up to three days of data on the ring, while Oura Ring 4 can store up to seven days.
For accuracy, Oura’s own product material positions Ring 5 as the company’s most accurate generation, supported by its redesigned sensor geometry and signal pathways.
Ring 5 prioritizes smaller, more efficient sensing hardware, while Ring 4 retains the advantage in on-ring data storage capacity.
Compare Oura Ring 5 and Oura Ring 4
Smallest design and newest hardware
- 6–9 day battery life
- 40% smaller by volume
- From 2 g depending on size
Broad sizing and proven Smart Sensing
- 5–8 day battery life
- Sizes 4–15
- Up to 7 days local data storage
Oura Ring 5 vs Oura Ring 4: Sleep, Readiness & Activity Tracking
Both rings are built around Oura’s core sleep, readiness and activity experience. With active membership, they support detailed sleep analysis, 24/7 heart-rate tracking, temperature trends, blood oxygen sensing, Daytime Stress, personalized activity goals and Automatic Activity Detection.
Oura Ring 5 launched alongside newer Oura software experiences, but Oura states that the core membership feature set remains shared with Ring 4. Many software updates introduced alongside Ring 5 are available to supported earlier generations depending on feature eligibility and rollout.
Sleep, readiness, activity and wellness remain central on both generations. Ring 5’s advantage is delivering that experience in a substantially smaller design.
Oura Ring 5 vs Oura Ring 4: Battery Life & Charging
Battery life favors the newer model. Oura rates Oura Ring 5 for typically 6–9 days depending on ring size and usage, compared with 5–8 days for Oura Ring 4. Oura rebuilt Ring 5’s battery system and added specialized firmware to maintain about a week of battery life despite the 40% smaller design.
Oura Ring 5 charges in about 80 minutes depending on the starting battery level. Ring 4 typically takes 20–80 minutes. Oura also offers a Ring 5 Charging Case separately; Oura says a 10-minute charge with the case can provide about a full day of battery life and the case can extend portable power for up to one month.
Official typical battery range
- About 80-minute charge
- Optional portable Charging Case
- About one day of battery in 10 minutes with case
Official typical battery range
- Typically 20–80 minute charging
- Size-specific charger
- Battery varies with size, settings and usage
Its official range extends one day further at both ends while fitting the battery into a significantly smaller ring.
Oura Ring 5 vs Oura Ring 4: Oura App, Membership & Software
Oura Membership is tied to your Oura account rather than to a specific ring. If you upgrade from Ring 4 to Ring 5, Oura says your membership, data and benefits carry over after pairing the new ring. In the US, Oura currently lists membership at $5.99 per month or $69.99 per year, with one included month for new members.
Newest hardware, same Oura ecosystem
- Detailed sleep analysis
- 24/7 heart-rate tracking
- Blood Oxygen Sensing
- Daytime Stress
- Cardiovascular Age & Cardio Capacity
- Women’s Health features
Core software remains fully supported
- Detailed sleep analysis
- 24/7 heart-rate tracking
- Blood Oxygen Sensing
- Automatic Activity Detection
- Resilience & reports
- Oura Labs and integrations
Oura explicitly states that Ring 5 with active membership includes the same features found on Ring 4, so a hardware upgrade is not required simply to retain the core Oura App experience.
Oura Ring 5 vs Oura Ring 4: Which Should You Buy?
The better choice depends on whether you value Ring 5’s major physical redesign enough to pay more, or whether Ring 4 already meets your needs with its broader sizing range and mature Smart Sensing platform.
You want Oura’s newest and smallest smart ring
- You want the 40% smaller design
- You prefer a ring starting from 2 g
- You want 6–9 day battery life
- You want Oura’s newest sensing architecture
- You want the optional Charging Case ecosystem
- Your finger fits the 6–13 size range
You want broader sizing and strong value
- You need size 4, 5, 14 or 15
- You are satisfied with 5–8 day battery life
- You want the same core membership software
- You value up to 7 days of local data storage
- You want a lower official starting price
- You do not need the smallest possible Oura design
Oura Ring 5 vs Oura Ring 4 FAQ
What is the main difference between Oura Ring 5 and Oura Ring 4?
Oura Ring 5 is a major hardware redesign. Oura says it is 40% smaller by volume, measures 6.09 mm wide and 2.28 mm thick, starts from 2 g and lasts typically 6–9 days. Oura Ring 4 is larger, weighs 3.3–5.2 g depending on size and lasts typically 5–8 days.
Is Oura Ring 5 more accurate than Oura Ring 4?
Oura describes Ring 5 as its most accurate generation yet. It uses a redesigned sensing architecture, low-profile sensor domes and 12 signal pathways designed to improve skin contact and consistency across finger types and skin tones.
Do Oura Ring 5 and Oura Ring 4 track the same health features?
Oura states that Ring 5 with active membership includes all of the same features found on Ring 4, including detailed sleep analysis, 24/7 heart-rate tracking, temperature monitoring, blood oxygen sensing, Daytime Stress and cardiovascular features.
Which has better battery life: Oura Ring 5 or Oura Ring 4?
Oura Ring 5 has the higher official range at typically 6–9 days, compared with 5–8 days for Oura Ring 4. Actual battery life varies with size, settings, battery age, feature configuration and usage.
Are Oura Ring 5 and Oura Ring 4 waterproof?
Yes. Oura rates both generations for water resistance to 100 meters or 328 feet. Oura says they are suitable for sauna and water sports but not for diving.
Can I use my Oura Ring 4 sizing kit for Oura Ring 5?
No. Oura says sizing differs slightly between generations and recommends using the correct sizing kit. Ring 5 is available in sizes 6–13, while Ring 4 is available in sizes 4–15.
Does my Oura Membership transfer from Ring 4 to Ring 5?
Yes. Oura Membership is tied to your Oura account rather than your physical ring, so your membership data and benefits carry over when you pair Ring 5 to the same account.
Oura Ring 5 vs Oura Ring 4: Final Verdict
Overall, the Oura Ring 5 vs Oura Ring 4 decision comes down to hardware refinement more than software access. Oura Ring 5 is the stronger all-around device if you want the newest design: it is 40% smaller by volume, significantly thinner, starts from 2 g, offers a 6–9 day battery range and uses Oura’s redesigned sensing architecture.
Oura Ring 4 remains highly relevant because Oura continues to support the same core health, sleep, activity and membership features. It also offers a broader size range from 4 to 15 and up to seven days of on-ring data storage. If comfort, miniaturization and battery endurance are your priorities, Ring 5 is the better upgrade. If Ring 4 fits comfortably and you are satisfied with 5–8 days of battery life, there is less software-driven reason to replace it.
Specifications and feature descriptions in this comparison are based exclusively on official Oura product, support and membership information. Battery life, pricing, availability and software rollouts can vary by size, settings, region and time.
Pick the Oura Ring that matches your priorities
Choose Oura Ring 5 for Oura’s smallest and newest hardware, or choose Oura Ring 4 if its wider size range, lower starting price and proven Smart Sensing platform better match your needs.
Specifications and feature information used in this Oura Ring 5 vs Oura Ring 4 comparison were checked exclusively against Oura’s official product, support, membership and launch resources.
