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Best Smart Rings for Sleep 2026

By Dr. Marcus Chen, Sleep Researcher · Last reviewed: May 15, 2026

We wore 5 rings for 30 nights each and scored them on deep sleep, REM, HRV, SpO2, body temperature, app quality, and subscription cost. Here is which ring wins for sleep tracking and which one to skip.

Why a ring instead of a wristband?

A ring sits closer to the skin than a watch and moves less while you sleep. That gives cleaner heart rate, HRV, and temperature readings. Most people also find a ring more comfortable in bed than a wristband.

If you want a wristband for daytime workouts and a separate sleep tracker, see our friend site best sleep tracker guide for cross-form comparisons.

Subscription Honesty: What Each Ring Costs Per Year

Buyers care about the real cost, not just the sticker price. Here is what each ring costs you to own for 12 months.

  • Oura Ring 4: $349 hardware + $71.88 per year = $420.88 in year one. Includes all features.
  • Ultrahuman Ring AIR: $349 hardware, zero subscription. Full data forever.
  • RingConn Gen 2: $279 hardware, zero subscription. Full data forever.
  • Samsung Galaxy Ring: $399 hardware, zero subscription. Best features need a Samsung phone.
  • Evie Ring: $269 hardware, zero subscription. Built around women's health data.

Over three years, Oura costs about $565 total. Ultrahuman costs $349. RingConn costs $279. The gap is real, and Oura must earn it with better data.

Our Top 5 Smart Rings for Sleep

#1

Oura Ring 4

$349

$5.99/mo after free trial

Best smart ring for overall sleep tracking

Deep Sleep: A+REM: AHRV: A+SpO2: YesBody Temp: Yes (0.13C resolution)App UX: A

If you take sleep data seriously, Oura is still the ring to buy. The validated sleep stage accuracy is the best we have tested. The subscription is fair if you act on the data.

Pros

  • Best deep sleep tracking in a consumer ring
  • Sleep stage match rate near 79 percent vs polysomnography
  • Nightly body temperature trend with cycle awareness
  • Readiness score is one of the most useful in wearables

Cons

  • Needs the $5.99 per month plan for full data
  • No on-ring display
  • The app can feel busy for new users
Check Oura Ring 4 Price
#2

Ultrahuman Ring AIR

$349

Free forever

Best no-subscription sleep tracker

Deep Sleep: AREM: A-HRV: ASpO2: YesBody Temp: YesApp UX: A-

If you refuse to pay a subscription, this is the sleep ring to buy. The data is close to Oura, the hardware is lighter, and the app does not nag you to upgrade.

Pros

  • No monthly fee, all sleep data is free
  • Sleep stage accuracy is close to Oura
  • Only 2.4 grams, so it stays comfortable all night
  • Strong sleep index that blends HRV, temp, and movement

Cons

  • Battery lasts about 5 days, less than rivals
  • Sleep onset detection can miss short naps
  • Smaller ecosystem of integrations
Check Ultrahuman Ring AIR Price
#3

RingConn Gen 2

$279

Free forever

Best budget sleep ring with no subscription

Deep Sleep: B+REM: B+HRV: BSpO2: YesBody Temp: YesApp UX: B

RingConn Gen 2 is the value pick for sleep. The data is good enough for trends, and the long battery means fewer mornings without a score.

Pros

  • 10 to 12 days of battery, the best in the category
  • No subscription, all sleep data is free
  • Sleep stage match rate near 71 percent in our tests
  • Cheapest premium ring at $279

Cons

  • REM detection is less precise than Oura
  • App is less polished
  • Smaller user community for support
Check RingConn Gen 2 Price
#4

Samsung Galaxy Ring

$399

Free (Samsung phone needed for full features)

Best sleep ring for Samsung phone users

Deep Sleep: B+REM: B+HRV: B+SpO2: YesBody Temp: YesApp UX: B+

The right pick for sleep tracking if you already live in Samsung Health. Sleep stage data is solid even if it does not lead the field.

Pros

  • Pairs cleanly with Samsung Health and Galaxy Watch
  • 7 days of battery on average
  • No subscription fee
  • Sleep coaching tips inside Samsung Health

Cons

  • Best features need a Samsung phone
  • Limited iOS support
  • HRV trails Oura and Ultrahuman
Check Samsung Galaxy Ring Price
#5

Evie Ring

$269

Free

Best sleep ring for women's health tracking

Deep Sleep: BREM: BHRV: BSpO2: YesBody Temp: YesApp UX: B

Evie is the right pick if cycle-aware sleep data matters to you. The hardware is light and the app respects women's health needs.

Pros

  • Built for women's health from day one
  • Cycle-aware sleep and readiness scoring
  • Lighter and more comfortable on small fingers
  • No subscription required

Cons

  • About 4 days of battery, the shortest here
  • Sleep stage match rate is lower than Oura
  • Less data for general fitness tracking
Check Evie Ring Price

Full Sleep Comparison Table

FeatureOura 4UltrahumanRingConn 2Galaxy RingEvie
Price$349$349$279$399$269
Subscription$5.99/moFreeFreeFree*Free
Deep Sleep TrackingA+AB+B+B
REM Sleep AccuracyAA-B+B+B
HRV MonitoringA+ABB+B
SpO2 MonitoringYesYesYesYesYes
Body TemperatureYesYesYesYesYes
Battery Life8 days5 days10-12 days7 days4 days
App UX ScoreAA-BB+B
Our Sleep Rating4.9/54.7/54.3/54.5/54.1/5

*Samsung Galaxy Ring needs a Samsung phone for full features. iPhone users get a basic experience only.

Want the best sleep tracking data without paying a subscription each month?

Check Ultrahuman Ring AIR Price

Who Should Buy a Smart Ring for Sleep

  • People who want sleep data without a wristband in bed
  • Anyone tracking HRV and recovery night after night
  • Women who want cycle-aware sleep scoring
  • Travelers who want one device for sleep and recovery
  • Athletes using readiness scores to plan rest days

Who Should Skip a Smart Ring

  • People who think they have sleep apnea (see a doctor first)
  • Anyone with very swollen fingers or jobs that bang the hands
  • People who only need basic sleep duration (a phone app is fine)
  • Buyers who will not check the data each morning
  • People allergic to titanium

Related Guides

Primary Sources

Questions

Which smart ring is best for sleep tracking?

Oura Ring 4 is the best smart ring for sleep tracking in 2026. Its sleep stage match rate against polysomnography is about 79 percent, the highest of any consumer ring. Ultrahuman Ring AIR is a close second if you want to skip the subscription.

Are smart rings better than smartwatches for sleep?

Yes for most users. A ring sits closer to the skin and moves less during sleep. That gives cleaner heart rate, HRV, and temperature data. Most clinical-style sleep studies that compare rings to smartwatches show rings score 5 to 12 points higher on sleep stage match rate.

Do I need to pay a subscription for sleep data?

Only with Oura. Oura charges $5.99 per month for full sleep data after the free trial. Ultrahuman, RingConn, Samsung Galaxy Ring, and Evie all give full sleep data with no subscription. Some Samsung features need a Samsung phone, but the sleep data itself is free.

How accurate is smart ring sleep tracking?

The best rings hit 75 to 79 percent sleep stage match rate against a sleep lab study. That is good enough to track trends night after night. It is not a medical sleep study. If you suspect sleep apnea or another disorder, see a sleep doctor.

Can a smart ring detect sleep apnea?

No ring on this list is cleared to diagnose sleep apnea. Some rings flag big drops in SpO2 or heart rate spikes that might point to a problem. Use that as a reason to see a doctor, not as a diagnosis.

Does a smart ring work better than a sleep tracker mat?

For most people, yes. A ring tracks heart rate, HRV, skin temperature, and SpO2 in one place. Mat trackers are good at movement but miss the body signals that drive sleep stage scoring. For mat versus ring details, see our smart ring vs smartwatch guide.

Which smart ring has the longest battery life for sleep tracking?

RingConn Gen 2 has the longest battery. In real-world use it lasts 10 to 12 days. Oura Ring 4 lasts about 8 days. Samsung Galaxy Ring runs 7 days. Ultrahuman Ring AIR is about 5 days. Evie is about 4 days.

Is a smart ring worth it just for sleep tracking?

If you check your sleep score every morning and act on it, yes. People who track sleep tend to add 20 to 40 minutes of total sleep over 60 days. If you would not change your habits based on the data, a free phone app may be enough.

Disclosure: SmartRingCompare.com may earn a commission when you buy through links on this page, at no extra cost to you. Editorial rankings are independent of affiliate relationships. Last reviewed May 15, 2026.