8 Best Smart Rings of 2026

Oura Ring 5 takes the sensor set of the Ring 4 and fits it into a ring Oura says is 40% smaller, at 6.09mm wide and 2.28mm thick. For sleep, it uses red and infrared LEDs for blood oxygen, green and infrared LEDs for heart rate, HRV and respiration rate, a temperature sensor and an accelerometer. The Oura App turns that into readiness, sleep and rest, stress and resilience, heart health and women's health views, and Oura says it tracks 50+ health metrics. Battery is rated at up to 6 to 9 days, the longest of any Oura ring, and a full charge takes about 80 minutes. The catch is cost: the US store price did not load in USD from our location, and the insights rely on Oura Membership, which Oura lists at $5.99 per month for US members. A quick-charging case is an extra purchase, and sizing differs from older Oura rings.

RingConn Gen 3 is the most complete no-subscription ring on this list for sleep. Overnight it records sleep duration, sleep stages, sleep apnea risk indicators and vascular load trends, and around the clock it tracks heart rate, HRV, blood oxygen, respiratory rate, skin temperature and stress. New for this generation are vibration alerts for health changes, sedentary reminders and low battery, plus vascular health trend insights, which RingConn is careful to describe as trends rather than single blood pressure readings. Its comparison table lists up to 14 days of battery, 10 days of offline storage, a 2.3mm titanium shell and sizes 6 to 15, with US pricing from $349. The universal charging case also charges other RingConn rings. Downsides are practical: Gen 3 sizing differs from earlier RingConn rings and standard ring sizes, and RingConn notes the ring is not a medical device, so apnea indicators are a prompt to see a doctor.

Oura Ring 4 remains on sale next to the Ring 5 and offers the same core Oura sleep model. Its Sleep Score combines total sleep, heart rate variability, nighttime movement and sleep regularity, and each morning you get deep, REM and light sleep stages. Blood oxygen sensing and the Nighttime Breathing view show whether breathing disturbances may be happening and how often. Readiness uses temperature trends, heart rate and sleep, while Symptom Radar looks for signs of strain that can come before a cold. Bedtime Guidance nudges you to wind down. The ring is titanium inside and out, water resistant to 100m and rated for 5 to 8 days per charge. Oura lists membership at $5.99 per month or $69.99 per year for US members, with the first month free, and the ring price did not load in USD from our location. Against the Ring 5 it is larger and has a shorter rated battery.

RingConn Gen 2 is the cheaper way to get apnea detection in a ring, and RingConn itself recommends it for people whose main focus is sleep and snoring risk. It measures time in REM, light and deep sleep, including naps, and detects breathing interruptions that may indicate sleep apnea. RingConn reports an OSAHS detection accuracy of 90.7% for its Sleep Breathing Insights algorithm, validated against a polysomnography reference dataset. During the day it tracks heart rate, blood oxygen, body temperature, steps and calories. The titanium ring is 6.8mm wide, 2mm thick and 2 to 3g, rated IP68 to 100m, and lasts up to 10 to 12 days depending on size, though RingConn warns the apnea feature can raise power use. US pricing starts at $299. What you give up against the Gen 3 is vibration alerts and vascular health insights, and the size-specific charging case cannot be replaced separately.

Ultrahuman Ring PRO is built around battery and storage. The unibody titanium ring is rated for up to 15 days in Chill Mode and about 12 in Turbo Mode, holds up to 250 days of data, and ships with a PRO charging case that Ultrahuman says adds up to 45 days of battery and a year of storage. For sleep, the Sleep Index rolls duration, resting heart rate, restfulness and REM, deep and light sleep into one metric, and Stress Rhythm reads heart rate and HRV against your circadian rhythm. Ultrahuman's PowerPlugs add free tools that suit sleepers: a Smart Alarm that wakes you in light sleep, Shift Work and Social Jetlag modes, and a Caffeine Window. An AFib Detection PowerPlug watches heart rhythm overnight, though some PowerPlugs are paid. There are no recurring fees for basic data. At $479 it costs the most here, and the slightly cheaper Ring AIR is listed alongside it.

The Galaxy Ring is Samsung's answer for people who want sleep data without a watch on the wrist. It reads heart rate with an optical bio-signal sensor and takes regular skin temperature readings while you sleep, and Samsung Health adds snore detection, which works when your phone sits within 2 feet of you. Each morning, Energy Score uses yesterday's sleep, heart rate and activity to estimate readiness, and Wellness Tips suggest sleep habit changes. The titanium ring comes in three scratch-resistant finishes, is rated 10ATM and IP68, and runs up to 7 days on sizes 12 and 13, or up to 6 days on smaller sizes, with a charging case that shows battery level. Samsung's US store lists it from $299.99 before trade-in. The trade-off is ecosystem: Energy Score and Wellness Tips require a compatible Samsung Galaxy AI phone, so it suits Galaxy owners best.

Circular Ring 2 is the pick here for people who want the ring itself to wake them. Its smart alarm studies your sleep and wakes you in a light stage with silent vibrations, so a partner is not disturbed. Overnight it measures four sleep stages, disturbances, sleep efficiency and circadian rhythm, along with respiratory rate, SpO2 sampled through the night and skin temperature against your baseline. The Kira assistant explains which parameters affect your sleep. Beyond sleep, Circular lists a single-lead ECG with AFib detection, blood-pressure trends and 14+ health tools in about four grams of titanium. The price is $349 as one purchase with no mandatory subscription, and it is HSA/FSA eligible. Limits: Circular rates battery at 8 days and water resistance at 50m, sizes run about half a size large, and a Circular Ring 3 waitlist is open, so the Ring 2 may be replaced.

The Wellue O2Ring is not a lifestyle smart ring, but it belongs here for people whose sleep worry is breathing. It is a continuous pulse oximeter worn on the finger overnight, logging blood oxygen, pulse rate and motion, and Wellue's app shows the data in real time on iOS and Android at no subscription cost. You can set custom low oxygen and abnormal pulse thresholds, and the ring vibrates on your finger when readings fall outside them, with five vibration levels from a gentle nudge to a wake-up. Wellue pitches this for CPAP users catching mask leaks and for people turning off their back. In the morning, PC and Mac software summarize oxygen drops, time spent low and a nightly Oxygen Score, with PDF and CSV export for a doctor. The O2Ring costs $159 and the O2Ring S $199. Battery lasts up to 16 hours, and it does not report sleep stages.