🗓 Released Oct 15, 2024
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Cycle Advice
CautionFirst-generation product — no release history to base predictions on
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Deals Advice
neutralNo upcoming deals on the radar
First-generation product — no release history to base predictions on
No upcoming deals on the radar
Oura Ring 4 is the fourth generation of the leading smart ring, launched October 2024. It monitors heart rate, HRV, SpO2, skin temperature, and respiratory rate 24/7 in a titanium ring weighing under 4 grams. Battery lasts 5–8 days depending on ring size and usage. An optional Oura Membership ($5.99/month or $69.99/year) unlocks personalised readiness, sleep, and activity insights in the app. Available in six finishes from $349.
Oura has refined its ring sensors across four generations. The Ring 4's flattened LED array delivers more accurate SpO2 and heart rate data than previous generations, especially during sleep.
Up to 8 days of continuous 24/7 tracking between charges in a ring that weighs as little as 4 grams. No screen to drain — just sensors running around the clock.
The Oura app supports iPhone and Android equally. Core health data syncs to Apple Health, Google Health Connect, and 40+ third-party fitness apps.
Health-focused wearers who want continuous biometric tracking without a watch on their wrist. Ideal for sleep researchers, recovery-focused athletes, and anyone who finds watches uncomfortable at night. Works with both iPhone and Android. The subscription is optional but unlocks most of the app's value.
The ring costs $349–$449 upfront. An Oura Membership ($5.99/month or $69.99/year) is technically optional — you can see basic step counts and sleep times without it — but most of the app's value (Readiness Score, detailed sleep stages, advanced HRV trends) requires a paid membership. Budget approximately $70/year on top of the hardware cost.
Oura Ring 4 ($349+) offers iOS and Android support, respiratory rate tracking, and a more mature platform — but adds a $5.99/month subscription for full features. Samsung Galaxy Ring ($399.99) has no subscription but only works with Android. Choose Oura if you have an iPhone or want deeper health data; choose Samsung if you're Android-only and want no ongoing fees.
Between 5 and 8 days depending on ring size (smaller rings have smaller batteries) and usage. Most users report 6–7 days in practice. Charging from 0–100% takes roughly 20–80 minutes.
Yes — the Oura app is available on both iOS and Android, and all features work equally on both platforms. The ring syncs to the app over Bluetooth.
Independent studies have found Oura's sleep staging to be among the most accurate of any consumer wearable, particularly for distinguishing REM from non-REM sleep. The on-finger optical sensors typically capture a stronger blood flow signal than wrist-based trackers.
The Ring 4 is available in 12 sizes from US size 4 to size 15. Oura ships a free sizing kit before you commit — important because smart ring sizing often differs from traditional ring sizing.