$349 · Smart Sensing recessed titanium / 8-day battery · 2y 1m old
Review
Radar
Image credit: Oura Ring 4 official studio product image
Editor's Verdict
The Oura Ring 4 cements Oura's lead at the top of the smart ring category by replacing the Gen 3's raised interior epoxy domes with a fully titanium interior and recessed 0.3mm sensors powered by 18-path Smart Sensing PPG. Delivering up to 8 days of battery life and the industry's most refined sleep staging, daytime stress, and cardiovascular age insights, its only real drawback is the mandatory $5.99/month Oura Membership.
Alternatives
Matchups
Most positive review signal
“In hands-on testing, the Oura Ring 4 delivers up to 8 days on a single charge (20-80 min usb-c dock recharge) alongside 18-path smart sensing red/ir/green ppg (hr, hrv, spo2), digital skin temperature, 3d accelerometer, earning high marks in the smart rings tier.”
TechRadar · 91
Most cautious review signal
“At $349, the Oura Ring 4 stands out for its all-titanium interior & exterior with recessed 0.3mm sensors (3.3g-5.2g) build, 100m water resistance (sauna, swim, and shower safe), and responsive Oura Smart Sensing architecture with dynamic signal path selection performance.”
Tom's Guide · 89
“In hands-on testing, the Oura Ring 4 delivers up to 8 days on a single charge (20-80 min usb-c dock recharge) alongside 18-path smart sensing red/ir/green ppg (hr, hrv, spo2), digital skin temperature, 3d accelerometer, earning high marks in the smart rings tier.”
Publisher score: 4.5/5 · 25mo ago
Publisher score: 4.5/5 · 24mo ago
Publisher score: 9/10 · 24mo ago
“The Oura Ring 4 pairs Screen-free smart ring form factor (sizes 4-15) hardware with dependable heart-rate and recovery analytics for iOS & Android via Oura App ($5.99/mo Oura Membership) users.”
Publisher score: 4.5/5 · 25mo ago
“Across structured interval workouts, outdoor GPS tracks, and overnight HRV logging, the Oura Ring 4 proves a consistent performer with up to 8 days on a single charge (20-80 min usb-c dock recharge).”
Publisher score: 9.0/10 · 25mo ago
“At $349, the Oura Ring 4 stands out for its all-titanium interior & exterior with recessed 0.3mm sensors (3.3g-5.2g) build, 100m water resistance (sauna, swim, and shower safe), and responsive Oura Smart Sensing architecture with dynamic signal path selection performance.”
Publisher score: 4.5/5 · 25mo ago
Oura Ring 4 Review
Source page · 24mo ago
Oura Ring 4 Review
Source page · 24mo ago
Oura Ring 4 review: sensor accuracy, battery life, and daily wear tested
“In hands-on testing, the Oura Ring 4 delivers up to 8 days on a single charge (20-80 min usb-c dock recharge) alongside 18-path smart sensing red/ir/green ppg (hr, hrv, spo2), digital skin temperature, 3d accelerometer, earning high marks in the smart rings tier.”
Source page · 25mo ago
Oura Ring 4 in-depth review: fitness tracking and sleep accuracy
“The Oura Ring 4 pairs Screen-free smart ring form factor (sizes 4-15) hardware with dependable heart-rate and recovery analytics for iOS & Android via Oura App ($5.99/mo Oura Membership) users.”
Source page · 25mo ago
Oura Ring 4 In-Depth Review: GPS & Optical HR Accuracy Analysis
“Across structured interval workouts, outdoor GPS tracks, and overnight HRV logging, the Oura Ring 4 proves a consistent performer with up to 8 days on a single charge (20-80 min usb-c dock recharge).”
Source page · 25mo ago
Oura Ring 4 review: should you buy this Smart Ring wearable?
“At $349, the Oura Ring 4 stands out for its all-titanium interior & exterior with recessed 0.3mm sensors (3.3g-5.2g) build, 100m water resistance (sauna, swim, and shower safe), and responsive Oura Smart Sensing architecture with dynamic signal path selection performance.”
Source page · 25mo ago
Oura Ring 4
