Oura Ring 5 vs 4: Which Smart Ring Deserves Your Finger?

Smart rings finally feel like real jewelry, and Oura is the brand that pushed the category there. The Oura Ring 5 landed in mid 2026, just 18 months after the Oura Ring 4 arrived. That fast upgrade cycle left thousands of owners asking one simple question.

Is the newer ring worth the extra money, or is the older one now the smartest buy on the shelf?

This comparison answers that question with real specs, real prices, and real testing notes from people who wore both rings for weeks. You will learn how the two models differ in size, sensors, battery, sizing, software, and long term value. You will also see three strong alternatives if neither Oura fits your budget.

By the end, you will know exactly which ring belongs on your hand. Let us get into it.

In a Nutshell

Short on time? These points cover the whole comparison in under a minute.

• The Oura Ring 5 is 40% smaller than the Oura Ring 4. It measures 6.09 mm wide and 2.28 mm thick, while the Ring 4 measures 7 mm wide and 2.88 mm thick. The weight drops from 3.3 to 5.2 grams down to just 2.0 to 2.69 grams.
• Battery life improves by roughly one day on paper. Oura rates the Ring 5 at 6 to 9 days and the Ring 4 at 5 to 8 days. Reviewers who tested both saw a bigger real world gap, closer to three extra days.
• Both rings share the same software. Health Radar, blood pressure signals, GLP 1 insights, live activity tracking, and lab result imports all work on Gen 3, Gen 4, and Gen 5 rings. You are not locked out by owning the older model.
• The Ring 4 is now the value pick. It starts near $349 and drops much lower during sales, while the Ring 5 starts at $399 and climbs to $499 for premium finishes.
• Sizing changed. The Ring 5 comes in sizes 6 through 13, while the Ring 4 covers sizes 4 through 15. Small and large fingers may only fit the older model.
• Both need the same membership. You pay $5.99 per month or $69.99 per year either way.

Oura Ring 5 Quick Look

Last update on 2026-08-22 / Affiliate links / Images from Amazon Product Advertising API

The Oura Ring 5 is the smallest smart ring on the market right now. Oura did not simply shrink the old design. The company rebuilt the sensor stack, the battery chemistry, and the internal frame from scratch.

The result feels different the moment you slide it on. It disappears between your fingers. Testers who found the Ring 4 chunky during weight training reported that the Ring 5 no longer catches or clicks against other rings.

Oura kept the all titanium body but added a physical vapor deposition coating. That coating improves scratch resistance, so daily wear should show less damage over a year of use.

The sensor layout changed too. The Ring 5 uses 12 signal pathways instead of the 18 found in the Ring 4. Fewer pathways sounds like a downgrade, yet Oura says the new low profile sensor domes sit closer to your skin and produce cleaner readings.

The company claims 99% heart rate accuracy against a medical ECG and 95% sleep staging accuracy against clinical sleep lab data. Those numbers come from Oura, not from independent labs, so treat them as marketing claims until third party testing confirms them.

Six finishes are available: Silver, Black, Brushed Silver, Stealth, Gold, and the new Deep Rose. The Gold looks lighter and more convincing than the Ring 4 version. Every finish carries a 100 meter water rating.

Oura Ring 4 Quick Look

Last update on 2026-08-23 / Affiliate links / Images from Amazon Product Advertising API

The Oura Ring 4 is still an excellent tracker. It earned top marks across nearly every major review site and held the crown as the best smart ring for well over a year.

It uses a fully titanium body with recessed sensors that sit flush against the inner wall. That design removed the raised bumps found on the Gen 3 and made the ring far more comfortable for all day wear.

Its biggest strength is coverage. With 18 signal pathways and Smart Sensing technology, the Ring 4 adapts to finger movement and picks the strongest signal available. That approach cut down on missing data during sleep and workouts.

Battery life sits at 5 to 8 days by Oura’s rating. Independent testing landed around seven days for a size 10 ring, which is genuinely strong for a device this small.

Sizing is the quiet advantage here. The Ring 4 covers sizes 4 through 15. If you have very slim or very large fingers, this is the only Oura that will fit you.

You also get the Ceramic edition, built with zirconia for extra scratch protection in Midnight and Cloud colors. No ceramic option exists for the Ring 5 yet.

Prices have fallen sharply since the Ring 5 launched. Silver and Stealth models start around $349, and sale periods have pushed the ceramic version near $250.

Head to Head Comparison Table

Here is the full side by side breakdown of both rings.

Feature	Oura Ring 5	Oura Ring 4
Launch date	May 2026	October 2024
Starting price	$399	$349
Premium finish price	$499	$399
Width	6.09 mm	7 mm
Thickness	2.28 mm	2.88 mm
Weight	2.0 to 2.69 grams	3.3 to 5.2 grams
Material	Titanium with PVD coating	Titanium or zirconia ceramic
Signal pathways	12	18
Battery life (rated)	6 to 9 days	5 to 8 days
Battery life (tested)	Around 7 to 10 days	Around 7 days
Charge time	20 to 80 minutes	20 to 80 minutes
Water rating	100 meters, IP68	100 meters, IP68
Sizes	6 to 13	4 to 15
Finishes	6	6 plus 2 ceramic
Charging case	$99 optional	$99 optional
Membership	$5.99 monthly or $69.99 yearly	$5.99 monthly or $69.99 yearly
Software support	Full	Full
Best for	New buyers and comfort seekers	Budget buyers and unusual sizes

The table shows something important. The gap between these two rings is physical, not functional. Both track the same metrics and run the same app features.

Top 3 Alternatives for Oura Ring 5 and Oura Ring 4

Not everyone wants a monthly membership. These three rings offer strong tracking without the subscription bill.

Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API

The Samsung Galaxy Ring is the easiest pick for Android users. It costs a flat price with no app fee, delivers up to seven days of battery, and pairs tightly with Samsung Health. Galaxy phone owners get extra perks like gesture controls and automatic workout detection.

Last update on 2026-08-23 / Affiliate links / Images from Amazon Product Advertising API

The RingConn Gen 3 pushes battery life further than anything Oura offers. It reaches roughly 14 days on a charge and adds vibration alerts plus vascular trend tracking. It also skips the subscription completely, which saves you $70 every single year.

Last update on 2026-07-01 / Affiliate links / Images from Amazon Product Advertising API

The Ultrahuman Ring Air targets athletes and biohackers. It weighs very little, handles 100 meter water resistance, and focuses on sleep, recovery, and movement scores. Optional add on modules let you expand features later.

None of these three match Oura’s sleep staging polish or app design. They do win on total cost of ownership. Over three years, an Oura setup costs roughly $210 in membership fees alone.

Pick Samsung if you own a Galaxy phone. Pick RingConn if battery life matters most. Pick Ultrahuman if training data drives your decisions.

Design and Comfort Compared

This is where the Ring 5 wins clearly. The 40% size reduction is not a marketing rounding trick. You feel it immediately.

The Ring 4 left a visible gap between the index and middle finger for many wearers. The Ring 5 sits flush and looks like a normal wedding band. People stop asking what it is.

Weight tells the same story. Hold both in your palm and the difference is obvious. A size 10 Ring 4 weighs around 5 grams. The same size Ring 5 weighs under 2.7 grams.

That matters most during sleep and during grip based exercise. Lifters who complained about the Ring 4 pressing into the bar report far less irritation with the newer model.

Both rings use nonallergenic titanium, so skin sensitivity is not a factor either way. The Ring 5 adds a PVD coating for scratch resistance, though early owners still report light surface marks after gym sessions.

The Ring 4 fights back with the Ceramic edition. Zirconia resists scratches better than any coated titanium, and it comes in Midnight and Cloud shades that look genuinely different from typical wearables.

Color choice is close. The Ring 5 introduces Deep Rose, a copper leaning tone that replaces the older rose gold. Its Gold finish also looks less orange and more like real jewelry.

If comfort ranks first on your list, the Ring 5 wins without much argument.

Sensor Accuracy and Health Tracking

Both rings measure the same core signals. You get heart rate, heart rate variability, blood oxygen, respiratory rate, skin temperature, and movement through an accelerometer.

The Ring 4 uses 18 signal pathways with Smart Sensing. That system checks multiple points and picks the cleanest reading as your finger shifts during the night.

The Ring 5 drops to 12 pathways but pairs them with brighter LEDs and redesigned sensor domes that press closer to your skin. Fewer pathways plus better contact produced stronger signals in Oura’s internal testing.

Oura reports a pulse signal up to 100 times stronger than wrist worn wearables. The company also claims better performance across different skin tones, which has been a real weakness for optical sensors industry wide.

Neither ring gives you continuous heart rate during workouts. Both show training zones instead of exact beats per minute. If you need precise workout heart rate, pair a chest strap through the app.

In practice, most users will not notice an accuracy difference in daily scores. Sleep stages, readiness, and activity numbers track closely between the two generations.

The real accuracy story favors the Ring 5 for people with slim fingers or restless sleep. Better skin contact reduces gaps in overnight data.

For everyone else, the Ring 4 remains accurate enough that upgrading for sensor reasons alone makes little sense.

Battery Life and Charging

Battery life separates good smart rings from frustrating ones. Nobody wants to charge a health tracker every three days.

Oura rates the Ring 4 at 5 to 8 days. Real world results vary widely by size and usage. Larger rings hold bigger batteries, so a size 12 lasts longer than a size 7.

One tester saw only four days from the Ring 4 with heavy feature use. Another measured just over seven days in standard conditions.

The Ring 5 is rated at 6 to 9 days. Testers consistently reported around a week or more, with one measuring 10.5 days. The redesigned battery chemistry and dedicated power firmware clearly helped.

Charging speed is identical. Both fill in roughly 20 to 80 minutes depending on how empty they are.

Each ring ships with a size specific charging base that plugs into USB C. Oura also sells a $99 aluminum charging case for both generations.

That case is matchbox sized and holds about a month of charges. It is the accessory travelers actually use, since you can skip the cable entirely on a long trip.

Battery is a genuine Ring 5 advantage. An extra two or three days per cycle means fewer nights of missing sleep data because you forgot to charge.

Sizing, Colors, and Style Options

Sizing deserves careful attention here, because the two rings do not fit the same way.

The Ring 4 offers sizes 4 through 15. That is one of the widest ranges in the smart ring market and it accommodates very small and very large fingers.

The Ring 5 narrows to sizes 6 through 13. If you wear a size 4, 5, 14, or 15, the Ring 5 is simply not an option for you.

Oura tells every buyer to order a fresh sizing kit before purchasing the Ring 5, even existing owners. The thinner band changes how the ring seats on your finger.

Most testers found their size stayed the same across generations. Still, the Ring 5 runs slightly tighter. If your Ring 4 fits snugly, consider sizing up.

Wear the test ring for a full 24 hours before deciding. Fingers swell with heat, salt, and exercise, then shrink in cold weather.

Style options are close to even. Both offer six finishes. The Ring 4 adds two ceramic colors that the Ring 5 cannot match yet.

Deep Rose and the updated Gold on the Ring 5 look more refined in person. If jewelry appearance drives your decision, view both before ordering.

Software Features and App Experience

Here is the detail that changes the entire comparison. Oura released a huge software update alongside the Ring 5, and almost all of it works on the Ring 4.

Health Radar gives you a predictive view of your health signals rather than a daily snapshot. It pulls in blood pressure signals and nighttime breathing patterns.

Blood pressure monitoring runs passively overnight. GLP 1 Insights supports members taking weight loss medication with dedicated tracking.

Live activity tracking finally shows real time workout data inside the app. Lab result imports let you upload blood biomarker files directly into your Oura profile.

There is also a ring and case finder that works like Find My on an iPhone, plus a data erasure control that deletes a specific window of history without wiping your trends.

Every one of those features runs on Gen 3, Gen 4, and Gen 5 rings. Oura did not gate its best software behind new hardware.

The core scores remain unchanged. You get Sleep, Activity, and Readiness scores daily, plus cardiovascular age, cardio capacity, and sleep regularity over time.

This is the strongest argument against upgrading. A Ring 4 owner gets the same app experience as a Ring 5 owner for zero extra dollars.

Software parity turns this into a hardware only decision.

Price and Membership Value

Money talks, and the two rings tell very different stories.

The Ring 5 starts at $399 for Silver and Black. Brushed Silver, Deep Rose, Gold, and Stealth cost $499.

The Ring 4 starts at $349 for Silver and Stealth. Gold sits at $399, down from its $499 launch price. The Ceramic edition dropped to $399 and has fallen near $250 during major sale events.

That price gap reaches $250 during promotions. For the same software and nearly the same tracking, that is a serious amount of money.

Membership costs are identical. You pay $5.99 monthly or $69.99 yearly for full app access. New rings include one free month.

Add three years of membership and your true Ring 5 cost approaches $610. The Ring 4 on sale lands closer to $460.

Competitors like RingConn and Ultrahuman charge nothing for their apps, which is why they keep gaining ground. Oura still wins on data quality and design, but the subscription remains its weak point.

Neither ring changes the membership situation. If a recurring fee bothers you, buying the newer ring will not fix that feeling.

Value goes to the Ring 4 by a comfortable margin.

Oura Ring 5 Pros and Cons

Last update on 2026-08-23 / Affiliate links / Images from Amazon Product Advertising API

Pros

• Smallest smart ring available, at 6.09 mm wide and 2.28 mm thick, so it looks and feels like ordinary jewelry rather than a gadget.
• Weighs just 2.0 to 2.69 grams, which makes overnight wear and gym sessions far more comfortable.
• Battery life reaches 6 to 9 days by rating, with several testers recording seven to ten days in normal use.
• Redesigned sensor domes improve skin contact, which helps people with slim fingers or restless sleep get cleaner data.
• PVD coating adds scratch resistance that the previous titanium finish lacked.
• New Deep Rose and updated Gold finishes look more like real jewelry than earlier Oura colors.
• Waterproof to 100 meters with an IP68 rating, so swimming and showering cause no concern.

Cons

• Costs $50 more at the entry level and $100 more for premium finishes compared with the Ring 4.
• Sizing range shrinks to 6 through 13, which excludes very small and very large fingers.
• Requires a new sizing kit even for existing Oura owners, adding a wait before you can order.
• Offers no ceramic version, so the toughest Oura finish is only available on the older model.
• Still requires the $69.99 yearly membership for full app access.
• Drops from 18 signal pathways to 12, and independent accuracy testing is still limited.

Oura Ring 4 Pros and Cons

Last update on 2026-08-23 / Affiliate links / Images from Amazon Product Advertising API

Pros

• Costs significantly less, especially during sales when the Ceramic edition has fallen near $250.
• Runs every major new software feature including Health Radar, blood pressure signals, and GLP 1 Insights.
• Offers the widest size range at 4 through 15, which fits nearly every hand.
• Uses 18 signal pathways with Smart Sensing, which adapts as your finger moves during sleep.
• Available in a zirconia ceramic build that resists scratches better than coated titanium.
• Delivers 5 to 8 days of battery, with real testing landing around a full week.
• Carries the same 100 meter water rating as the newer model.
• Proven track record with more than a year of user feedback and independent reviews behind it.

Cons

• Noticeably thicker and heavier at 7 mm wide and up to 5.2 grams, which some lifters find annoying.
• Leaves a visible gap between fingers, so it reads more as a device than as jewelry.
• Titanium finish scratches more easily than the coated Ring 5 unless you buy the ceramic version.
• Battery drops faster with heavy feature use, with one tester seeing only four days.
• Colors look slightly dated next to the refreshed Ring 5 palette.
• Will eventually stop receiving new hardware dependent features as Oura moves forward.

Verdict: Which Oura Ring Should You Buy?

Here is the clear answer, broken down by who you are.

Buy the Oura Ring 5 if you are new to Oura. Starting fresh means you are choosing between two prices that are only $50 apart at retail. The smaller size, better battery, and refreshed sensors justify that difference easily.

Buy the Oura Ring 5 if comfort is your top priority. People who found the Ring 4 bulky during sleep or weight training will notice the change on day one.

Buy the Oura Ring 4 if you want the best value. Sale prices make it one of the strongest deals in wearables, and you lose nothing on the software side.

Buy the Oura Ring 4 if your finger falls outside sizes 6 to 13. The older model is your only Oura option.

Buy the Oura Ring 4 Ceramic if durability matters most. Zirconia handles daily abuse better than any coated titanium body.

Skip the upgrade if you already own a Ring 4. You would be paying full price for a thinner band and slightly better battery. Every headline software feature already works on your current ring.

Upgrade from a Gen 3 or older ring. Hardware accuracy has improved meaningfully across two generations, and pre Gen 3 rings lose access to the new features entirely.

Consider RingConn or Samsung if the membership fee bothers you. No Oura model solves that.

Frequently Asked Questions

Is the Oura Ring 5 worth upgrading from the Ring 4?

For most people, no. The Ring 5 is smaller and lasts slightly longer per charge, but it tracks the same metrics and runs the same software. Upgrade only if comfort genuinely bothers you with your current ring.

Do both rings need a subscription?

Yes. Both require the Oura membership at $5.99 per month or $69.99 per year for full app access. Without it, you see only basic daily scores. New rings include one free month.

Which Oura Ring has better battery life?

The Ring 5 wins. Oura rates it at 6 to 9 days versus 5 to 8 days for the Ring 4. Independent testers recorded meaningfully longer runtimes on the newer model, sometimes exceeding ten days.

Will my Oura Ring 4 size fit the Ring 5?

Usually, but not always. The Ring 5 runs slightly tighter because of its thinner profile. Oura recommends ordering a free sizing kit and wearing the test ring for a full 24 hours before buying.

Can I swim with either ring?

Yes. Both models are rated to 100 meters with IP68 protection. Swimming, showering, and washing dishes cause no damage to either generation.

Does the Ring 4 still get new features?

Yes. Health Radar, blood pressure signals, live activity tracking, GLP 1 Insights, and lab result imports all work on Gen 3, Gen 4, and Gen 5 rings. Oura kept its software open across generations.

Which ring is more accurate?

Oura claims the Ring 5 is its most accurate generation, citing 99% heart rate accuracy against ECG and 95% sleep staging accuracy. Those figures come from Oura, not independent labs. Daily score differences between the two rings are small for most users.

Is there a cheaper smart ring worth buying instead?

Yes. The RingConn Gen 3, Samsung Galaxy Ring, and Ultrahuman Ring Air all skip the subscription and cost less over three years. They trade away some sleep tracking polish and app refinement in return.