Oura Ring 5 vs Oura Ring 4: What Changed, Is It Worth It?

What Actually Changed From Ring 4 to Ring 5

Oura rebuilt three things at once: the physical size, the sensor hardware, and the feature set. Here is what's different, not just what's marketed.

• Size and weight: Ring 5 measures 6.09mm wide by 2.28mm thick and weighs 2-2.6g, versus Ring 4's 7.90mm width, 2.88mm thickness, and 3.3g-plus starting weight. That is a 40% size reduction Oura says improves comfort and reduces the chance of a bulky-feeling ring.
• Sensors: Ring 5 uses redesigned, lower-profile sensor domes that sit closer to the skin with more powerful LEDs, aimed at more consistent readings across a wider range of finger sizes and skin tones. That targets a real accuracy complaint some Ring 4 owners with larger fingers or darker skin tones raised.
• Battery: 6-9 days per charge on Ring 5 versus 5-8 days on Ring 4, with a full charge taking up to 80 minutes.
• New feature, Health Radar Blood Pressure Signals: Ring 5 adds a nighttime blood-pressure-signals feature. This is a wellness signal, not a clinical measurement. Oura has not received FDA clearance for it, frames it as detecting overnight patterns rather than reporting systolic/diastolic numbers, and is pursuing FDA clearance with a timeline company watchers place in late 2026 or 2027. Do not use it in place of a blood-pressure cuff.
• Metric count: Oura now advertises 50+ health metrics on Ring 5, versus a smaller published set on Ring 4, though the two generations still share the same core Readiness, Sleep, and Activity scoring.

Oura Ring 5 vs Oura Ring 4: Side-by-Side

Prices are 2026 figures for context. Verify current pricing at ouraring.com before you buy, since Ring 4 clearance pricing moves by retailer and date.

Is the Ring 5 Upgrade Worth the Extra $50?

The price moved up, not down — Ring 5's $399 base finish costs $50 more than Ring 4's $349 list price, and the membership fee did not change. That $50 buys a smaller and lighter ring, roughly one extra day of battery per charge, sensor changes aimed at more consistent readings across finger sizes and skin tones, and the new (non-clinical) blood-pressure-signals feature. None of that is a dramatic capability jump. It is an incremental refinement, not a new category of data.

Our own keyword-driven content-gap tracking treats a hardware release like this the same way it treated Foundayo's FDA approval earlier this run: as soon as a new generation ships, the comparison and "is it worth it" queries follow within weeks, well before search-volume tools catch up. That gap, a release the paid keyword tools have not priced in yet, is exactly why this page exists.

The Verdict: Upgrade, Wait, or Run Both

This is a size-and-refinement upgrade, not a reason to abandon a working Ring 4. Match the decision to your situation:

• Upgrade now if: you do not yet own an Oura ring, since Ring 5 is the current model with a longer warranty runway and the newest sensors. Pay the extra $50.
• Upgrade now if: your current ring feels bulky, or you have struggled with sizing or reading consistency on Ring 4. The smaller body and reworked sensors directly target that complaint.
• Stay on Ring 4 if: your current ring already tracks sleep, HRV, and readiness reliably. Nothing about Ring 5's changes invalidates Ring 4's existing data or breaks its app support.
• Consider clearance Ring 4 if: budget is the deciding factor and you do not need the smaller size or blood-pressure-signals feature. The discounted Ring 4 delivers the same core Readiness/Sleep/HRV tracking most buyers actually use.

Whichever ring you choose, the membership decision is separate. See our Oura Ring cost breakdown for the full multi-year math. And a ring alone is a signal, not a diagnosis: take our free health assessment to see which metabolic factors matter most for you, or start at the metabolic health hub.

How Ring 5 Changes the Rest of the Wearables Field

Ring 5's price increase narrows, but does not close, Oura's cost gap with subscription-only rivals like Whoop. See Oura vs Whoop for the updated math. Against the Apple Watch, Ring 5's smaller size widens Oura's comfort advantage for overnight wear; see Oura vs Apple Watch. If a subscription is the dealbreaker regardless of generation, our Oura Ring alternatives roundup covers the no-fee competitors.

Where to buy the Oura Ring

Oura Ring 5 - Silver - Size 8 - World’s Smallest Smart Ring - Sleep, Activity, Women’s Health, AI Advisor, 1 Week of Battery Life, Size Before You Buy, Android & iOS Compatible

OURA

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Oura Ring 5 - Stealth - Size 9 - World's Smallest Smart Ring - Sleep, Activity, Women's Health, AI Advisor, 1 Week of Battery Life, Oura App, Android & iOS Compatible

OURA

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