Oura Ring 5: Is It Worth Upgrading From Ring 4?

If you already own an Oura Ring 4, the Oura Ring 5 upgrade from Ring 4 question is not the same decision a first-time buyer is making. You're not choosing whether to start tracking sleep and recovery — you already have a working system, a finger that's adjusted to a ring you wear 24/7, and a device most owners describe as comfortable and reliable. The question is narrower and more practical: does a ring that's 40% smaller, with redesigned sensors and a $50 higher price, justify replacing a device that's already working well?

This guide is built for that exact buyer — the current Ring 4 owner deciding whether the upgrade is worth it, not someone comparing smart rings for the first time.

Oura Ring 5 vs Ring 4: At a Glance

	Oura Ring 4	Oura Ring 5
Starting Price	$349 (Silver, Black)	$399 (Silver, Black)
Premium Finishes	$399–$499 (Stealth, Gold, Rose Gold, Ceramic)	$499 (Stealth, Gold, Deep Rose, Brushed Silver)
Width	7.90mm	6.09mm
Thickness	2.88mm	2.28mm
Size Reduction	—	40% smaller than Ring 4
Sensor Pathways	18 signal pathways (Smart Sensing)	12 signal pathways, redesigned low-profile domes
Battery Life	5–8 days	6–9 days
Charging Case	Sold separately	Sold separately — up to 1 month total charge
Waterproofing	100m (IP rating not specified)	100m, IP68
Membership Cost	$5.99/month or $69.99/year	$5.99/month or $69.99/year
New Software Features	Available via update	Launches alongside Health Radar, GLP-1 Insights, Counsel Health AI care (also rolling out to Ring 4)
Best For	Owners satisfied with current size and comfort	Owners wanting the smallest, lightest option and the newest hardware

The Honest Starting Point: Ring 4 Is Not a Bad Product

Before getting into what's different, it's worth being direct about something most upgrade-focused comparisons gloss over: Oura Ring 5 launched just a year and a half after Ring 4, which means a lot of current Ring 4 owners are nowhere near due for a natural replacement cycle. Ring 4 remains a fully supported, currently sold product — Oura didn't discontinue it, and it's still available at $349 alongside Ring 5 at $399, not phased out the way Ring 3 was when Ring 4 launched.

Just as important: most of the software-side improvements Oura announced alongside Ring 5 — Health Radar, GLP-1 Insights, and AI-enabled care through its Counsel Health partnership — are rolling out to Ring 4 (and Ring 3) as well, not locked to the new hardware. That means a meaningful share of what's "new" with this launch isn't actually a reason to buy new hardware at all.

What Actually Changed: Size, Sensors, and Battery

The headline change is size: Ring 5 is 40% smaller than Ring 4, measuring 6.09mm wide and 2.28mm thick compared to Ring 4's 7.90mm width and 2.88mm thickness. Oura describes this as a full re-engineering rather than simply shrinking the existing design — the ring is built to feel and fit like an ordinary ring rather than an obviously "smart" device, and Oura says it can now be worn comfortably on the index, middle, or ring finger rather than being best suited to one position.

The sensor architecture changed in a less straightforward way than a simple upgrade. Ring 4 uses 18 signal pathways through its Smart Sensing system; Ring 5 uses 12 pathways, but through redesigned, precision-engineered low-profile sensor domes that Oura says deliver better skin contact and more consistent readings across more finger types and skin tones, with a pulse signal Oura claims is up to 100 times stronger than wrist-based wearables. In other words, Ring 5 has fewer total pathways but Oura is positioning the new sensor design as more accurate, not less — this is a case where the bigger number on the spec sheet (Ring 4's 18 pathways) doesn't map directly to "better," since the underlying sensor technology changed between generations.

Battery life improved modestly despite the smaller body — 6 to 9 days on Ring 5 versus 5 to 8 days on Ring 4 — which Oura attributes to a rebuilt battery chemistry and dedicated power-management firmware rather than simply fitting a bigger cell into a smaller space. The separately sold charging case also got an update, now holding up to a full month of charge for travel.

The honest caveat: independent early reviewers who've worn both rings side by side are largely landing in the same place — the size and sensor changes are real and noticeable, but for most current Ring 4 owners whose ring fits comfortably and hasn't degraded, the improvement is meaningful rather than essential. The clearest upgrade case is for people whose Ring 4 has always felt slightly bulky, scratched up over time, or never quite fit right.

The Upgrade Math: What You're Actually Paying For

This is where the decision gets concrete. Ring 5 starts at $399 for Silver or Black — a straightforward $50 increase over Ring 4's $349 starting price — and $499 for the four premium finishes (Stealth, Gold, Deep Rose, Brushed Silver), the same premium-tier pricing structure Ring 4 used. Unlike some hardware upgrade cycles, this isn't a steep price jump; it's a modest one.

What that $50 premium buys: a ring that's 40% smaller and noticeably less obtrusive day to day, a redesigned sensor architecture Oura claims is more accurate across more finger types and skin tones, roughly one extra day of battery life, and IP68-rated waterproofing specified more precisely than Ring 4's spec sheet. What it does not buy: access to the new software features, since Health Radar, GLP-1 Insights, and AI-enabled care are rolling out to Ring 4 and even Ring 3 as well.

The honest trade-off: if your Ring 4 already fits well and you haven't noticed sizing or comfort issues, you are paying $399–$499 primarily for a smaller physical object and a sensor redesign whose real-world accuracy difference is, by most early accounts, subtle rather than dramatic. If size and discretion genuinely matter to you — wearing rings during sports, finding Ring 4 slightly bulky, or simply preferring the smallest possible device — the upgrade addresses that directly and is hard to replicate any other way.

Who Should Actually Upgrade

The decision splits fairly cleanly along a few lines, rather than being a universal "yes" or "no."

Upgrade if: your Ring 4 has always felt slightly bulky or catches during workouts, sports, or specific hand positions; your ring has visibly scratched or your battery life has noticeably degraded after a couple of years of wear; you have a smaller finger and have never gotten quite the fit you wanted; or the smallest, most discreet wearable available genuinely matters to your daily comfort.

Stay with Ring 4 if: your current ring fits well and you haven't noticed comfort or durability issues; you primarily want the new software features, since those are coming to Ring 4 regardless of hardware; or the $50 premium and the hassle of resizing and re-onboarding isn't worth a sensor and size change you may not notice strongly in daily use.

Frequently Asked Questions: Oura Ring 5 Upgrade From Ring 4

Is the Oura Ring 5 upgrade from Ring 4 worth it?

It depends on your specific friction points with Ring 4. If your ring has felt bulky, caught during activity, or never fit quite right, the 40% size reduction directly addresses that. If your Ring 4 is comfortable and working well, the improvement is real but more subtle — and the new software features are coming to Ring 4 regardless of whether you upgrade the hardware.

Do I get Oura's new Health Radar and AI features if I keep my Ring 4?

Yes. Oura has confirmed that Health Radar, GLP-1 Insights, and AI-enabled care through its Counsel Health partnership are rolling out to members with Oura Ring Gen 3 and newer — meaning Ring 4 owners get these features through a software update, not a hardware purchase.

Is Oura Ring 4 being discontinued now that Ring 5 is out?

No. Unlike the Ring 3-to-Ring 4 transition, Oura is continuing to sell Ring 4 alongside Ring 5 at $349, giving buyers a genuine choice between the two rather than phasing out the older model.

How much smaller is the Oura Ring 5 than Ring 4?

Ring 5 is 40% smaller by volume, measuring 6.09mm wide and 2.28mm thick compared to Ring 4's 7.90mm width and 2.88mm thickness. Oura says this allows comfortable wear on the index, middle, or ring finger, not just the typical ring finger placement.

Does Oura Ring 5 have better sensors than Ring 4?

It's a redesign rather than a straightforward upgrade in pathway count — Ring 4 uses 18 signal pathways, while Ring 5 uses 12 through newly engineered low-profile sensor domes that Oura says deliver better skin contact and more consistent accuracy across a wider range of finger types and skin tones. Early independent testing suggests the real-world difference is more about consistency than dramatically different numbers.

Does my Oura Ring 4 size carry over to Ring 5?

Not necessarily. Because Ring 5 has an entirely new, smaller body, Oura recommends using the Ring 5 Sizing Kit even if you already know your Ring 4 size, since the fit doesn't always translate directly between generations.

Vapour & Stone Verdict

Upgrade to Oura Ring 5 if your Ring 4 has ever felt bulky or caught during activity, if your ring's finish or battery life has visibly degraded over time, or if wearing the smallest, most discreet device available genuinely matters to your daily comfort.

Stay with your Ring 4 if your current ring fits well and shows no wear, and remember that Oura's major new software features — Health Radar, GLP-1 Insights, and AI-enabled care — are coming to your existing ring through an update regardless of which hardware you choose.

For the full picture of how Oura's current lineup compares to the other major recovery wearable on the market, see our Oura Ring 4 vs WHOOP 5.0 comparison, and for the complete biohacker home recovery stack, our complete biohacker home checklist covers every specification.

The Oura Ring 5 upgrade from Ring 4 is a real, considered hardware refinement — smaller, more comfortable, slightly longer battery life — but it's not an urgent one for most current owners, especially with the major software improvements arriving for Ring 4 regardless. Unlike a first purchase decision, this one rewards patience: if your current ring is working well, there's no harm in waiting for your next natural replacement cycle.

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