PRODUCT REVIEWS & BUYING GUIDES
US EDITION · USD

WEARABLES COMPARISON

Oura Ring alternatives: rings without a subscription, compared

Oura Ring 5 costs $399 and Ring 4 $349, and both need Oura’s $69.99-a-year membership for most of the app. Five rings here have no required fee, from $199 for RingConn Gen 2 Air to $479 for Ultrahuman Ring PRO. This page lines them up on three-year cost, battery, sensors, accuracy evidence, warranty, returns and US import status.

The bottom line

There’s no exact Oura dupe, but five rings here skip the membership. They run from $199 for RingConn Gen 2 Air to $479 for Ultrahuman Ring PRO, and most make returns harder than Oura does. The studies Oura cites tested earlier rings, and we found no published validation study of any current ring here.

Our reviews rest on published sources, not hands-on testing. Our method

Porsche also cofounded Superhuman Chambers, which sells hyperbaric chambers · About the author. This is general information, not medical advice, and no clinician has reviewed it.

These links go to each brand’s own store and earn us no commission. Prices are dated US snapshots.

In this article

The seven rings side by side

Every alternative here costs less than either Oura over three years, counting the price and any required fee. RingConn Gen 2 Air comes to $199, and RingConn Gen 3 and Circular Ring 2 to $349 each212235. Samsung Galaxy Ring comes to $399.99 and Ultrahuman Ring PRO to $4791429. Oura Ring 4 comes to $558.97 and Ring 5 to $608.97 on annual billing346.

None of these figures is evidence of a health or longevity effect. Battery life is each maker’s own rating, and it depends on ring size and settings1528.

Prices are US list prices on each maker’s own store, before tax, and none was a sale price when checked. Samsung’s was checked on October 13, 2026, Circular’s on October 24 and the rest on October 23. Circular’s price includes shipping and US import duties37. Every figure is the maker’s own unless a study is named.

Prices, fees, battery, phone and returns for seven smart rings, checked Oct 13 to 24, 2026
RingBest forUS pricePrice and where to buyRequired feeThree-year costBatteryPhoneReturns
Oura Ring 5 (Silver)Staying with Oura in its newer ring$399 for Silver. Black is also $399, and four other finishes are $49914$399US price, checked Check price at Oura for Oura Ring 5 Oura Membership: $5.99 a month or $69.99 a year, before tax3$608.97 on annual billing ($399 + 3 × $69.99), before tax346 to 9 days, depending on ring size and use12iOS and Android12Within 30 days of receipt, if fully functional and undamaged. Original shipping isn’t refunded7
Oura Ring 4 (Silver)Oura’s app and scores at $349 up front$349 for Silver6$349US price, checked Check price at Oura for Oura Ring 4 Oura Membership: $5.99 a month or $69.99 a year, before tax36$558.97 on annual billing ($349 + 3 × $69.99), before tax365 to 8 days, depending on ring size, app settings and features5iOS and Android5Within 30 days of receipt, if fully functional and undamaged. Original shipping isn’t refunded7
Ultrahuman Ring PRO (Aster Black)Paying once and charging rarely$479 in all four finishes, with the charging case included14$479US price, checked Check price at Ultrahuman for Ultrahuman Ring PRO None for accessing your data. Optional PowerPlugs and the Ultrahuman Max membership cost extra14$479, before optional add-ons14Up to 15 days, or up to 45 days between wall charges with the case141517Ultrahuman app on the App Store and Google Play1415Within 30 days of delivery, with all original accessories. Return shipping is free1516
RingConn Gen 3 (Matte Black)No fee, a charging case and up to 14 days a charge$349 for Matte Black, with the charging case included21$349US price, checked Check price at RingConn for RingConn Gen 3 None. The page says ‘No Subscription Required’21$3492110 to 12 days with vibration on, 11 to 14 days with it off21iOS 17.0 or later, Android 10.0 or later21Within 14 days, only for a valid reason such as a defect. It must be unopened and unused, and you pay return shipping23
RingConn Gen 2 Air (Galaxy Silver)A $199 ring with no fee$199 in every size and both colors, with a charging dock22$199US price, checked Check price at RingConn for RingConn Gen 2 Air None. RingConn lists the subscription fee as ‘Free’22$19922Up to 10 days, depending on ring size22iOS 17.0 or later, Android 10.0 or later22Within 14 days, only for a valid reason such as a defect. It must be unopened and unused, and you pay return shipping23
Samsung Galaxy Ring (Titanium Black)Samsung Galaxy phone owners$399.99 for Titanium Black on Oct 13. It showed as not in stock at the same price on Oct 2029. On Oct 13, Samsung’s ring page also advertised ‘From $299.99 before trade-in’ without naming sizes or colors28$399.99US price, checked Samsung’s store showed Titanium Black as not in stock on October 20.None listed28$399.9929Up to 7 days for sizes 12 and 13, up to 6 days for smaller sizes28A compatible Samsung phone, per Samsung’s US page28Request within 15 days of delivery. A 5% restocking fee applies unless it arrives damaged or defective30
Circular Ring 2 (Obsidian Black)An on-demand ECG from a ring$349 for Obsidian Black, with the charging case, shipping and US import duties included3537$349US price, checked Check price at Circular for Circular Ring 2 None mandatory. The advanced parts of blood pressure and glucose are paid3440$349, before paid features or the $20-a-year Circular+ Guarantee3435About 8 days in power mode, about 5 days in performance mode34iOS and Android34Within 14 days of receipt, if unused. You pay return shipping, and Circular keeps $25 of the refund3637

These links go to each brand’s own store and earn us no commission.

Which Oura Ring alternative suits you

Each suits a different need, and this isn’t a ranking. All seven send sleep, heart-rate and temperature readings to a phone app151421222834. They differ in what you pay each year, how often you charge and how easily you can send one back.

  • Paying once and charging rarely: Ultrahuman Ring PRO. It’s $479 with the charging case included, and Ultrahuman says there are no recurring fees for accessing your data14. It lists up to 15 days a charge and up to 250 days of storage1417. The trade-off: Ultrahuman publishes no accuracy figures for Ring PRO, and some features are paid PowerPlugs1415.
  • No fee, a charging case and up to 14 days a charge: RingConn Gen 3. It’s $349, the page says ‘No Subscription Required’, and the ring stores 10 days of data offline21. The trade-off: returns need a valid reason such as a defect23. RingConn also publishes no validation for its vascular and sleep apnea insights21.
  • A $199 ring with no fee: RingConn Gen 2 Air. RingConn lists the subscription fee as free and rates the battery at up to 10 days22. The trade-off: it charges on a wired dock, and RingConn doesn’t list its sensor types22. The same 14-day, valid-reason return policy applies23.
  • Samsung Galaxy phone owners: Samsung Galaxy Ring. It’s $399.99 for Titanium Black, with no subscription listed2829. Find My Ring shows its last location, and a double pinch can control phone functions28. The trade-off: Samsung says it needs a compatible Samsung phone, and the ring page gives no warranty length28.
  • An on-demand ECG from a ring: Circular Ring 2. It’s $349 with a wireless charging case, and Circular says no subscription is mandatory3435. It adds a single-lead ECG you can export as a PDF34. The trade-off: Circular calls its blood pressure readings wellness estimates and publishes no accuracy data for them3445.
  • Staying with Oura in its newer ring: Oura Ring 5. It’s $399 for Silver, 2.28 mm thick and rated at 6 to 9 days a charge124. Oura cites published studies for its accuracy figures, though they tested earlier rings89. The trade-off: most insights need the $69.99-a-year membership, and the ring holds only up to 3 days of data23.
  • Oura’s app and scores at $349 up front: Oura Ring 4. It’s Oura’s previous ring, with the same membership36. It stores up to 7 days of data, against up to 3 on Ring 52. The trade-off: it’s thicker, at 2.88 mm against 2.28 mm, and Oura rates its battery at 5 to 8 days15.

Is there an Oura Ring dupe?

Not an exact one. Every ring here tracks sleep and heart rate in an app, and each alternative skips Oura’s membership1421222834. Each one also gives up something Oura Ring 5 has. Here’s what you trade away, and what you get back.

  • Ultrahuman Ring PRO gives up the slimmer build and any published accuracy figures. It’s 2.65 mm thick and 3.3 to 4.8 g, against 2.28 mm and from 2 g for Ring 5117. Ultrahuman publishes no accuracy figures for it15. You get a $479 one-time price, up to 15 days a charge and free return shipping1415.
  • RingConn Gen 3 gives up Oura’s easier returns. RingConn takes a ring back within 14 days only for a valid reason such as a defect, and only unopened and unused23. Oura takes returns within 30 days if the ring is fully functional and undamaged7. You get a $349 ring with a charging case, no subscription and up to 14 days a charge21.
  • RingConn Gen 2 Air gives up the charging case, a published sensor list and the same easy returns. It charges on a wired dock, and RingConn doesn’t list its sensor types2223. You get a $199 ring with no subscription and up to 10 days a charge22.
  • Samsung Galaxy Ring gives up phones other than Samsung’s. Samsung’s US page says it needs a compatible Samsung phone, while Oura works with iOS and Android128. Return requests close 15 days after delivery, with a 5% restocking fee30. You get no listed subscription and up to 7 days a charge in sizes 12 and 1328.
  • Circular Ring 2 gives up Oura’s 30-day return window. Returns run 14 days, the ring must be unused, and Circular keeps $25 of the refund3637. You get a $349 ring with a charging case, an on-demand single-lead ECG and no mandatory subscription3435.
  • Oura Ring 4 isn’t a dupe but Oura’s previous ring, with the same $69.99-a-year membership36. It’s 7.90 mm wide and 2.88 mm thick, against 6.09 mm and 2.28 mm for Ring 515. You get $50 off the ring and up to 7 days of storage instead of 3246.

Ultrahuman vs Oura: which ring should you get?

Get Ultrahuman Ring PRO if you’d rather pay once and charge less often. It’s $479 with the charging case included, and Ultrahuman says there are no recurring fees for accessing your data14. Oura Ring 5 is $399 plus $69.99 a year, so three years come to $608.97 before tax34. Ultrahuman lists up to 15 days a charge, against 6 to 9 days for Ring 5114.

Get Oura Ring 5 if you want the slimmer ring and published, if older, evidence. Oura cites published studies for its accuracy figures, though they tested earlier rings89. Ultrahuman’s FAQ gives no figures for Ring PRO and names no study15. Some Ring PRO features cost extra as PowerPlugs, such as $24 for a year of Cardio Adaptability14.

Both take returns within 30 days. Ultrahuman pays return shipping, and Oura doesn’t refund the original shipping715. Ring PRO’s US sales rest on a March 2026 US Customs ruling that its redesign falls outside an ITC import ban won by Oura1819. The three-way comparison with WHOOP covers these two rings in more depth.

RingConn vs Oura: which ring should you get?

Get a RingConn if you won’t pay a membership. Gen 3 is $349 with a charging case, and Gen 2 Air is $199 with a wired dock2122. Neither has a subscription2122. RingConn rates Gen 3 at 10 to 14 days a charge and Gen 2 Air at up to 10, against 6 to 9 days for Oura Ring 512122.

Get Oura if you might change your mind. Oura takes a ring back within 30 days if it’s fully functional and undamaged7. RingConn takes returns within 14 days only for a valid reason such as a defect, and you pay return shipping23. RingConn’s warranty runs 1 year in the US and excludes battery replacement23.

RingConn publishes no accuracy figures or validation studies for either ring2122. Its operating range tops out at 104°F (40°C), so neither is for the sauna2122. RingConn settled with Oura in October 2025 and pays it royalties under a multi-year patent license25.

What a ring without a subscription really costs

Oura’s fee buys most of its app. The membership is $5.99 a month or $69.99 a year in the US, and paying monthly comes to $71.88 a year3. Without it, the app shows only the Readiness, Activity and Sleep scores, the ring battery, basic profile, settings and Explore content3. You can still export all your data as CSV3.

No required fee doesn’t mean nothing is sold on top. Ultrahuman sells some features as PowerPlugs, such as $39 for a year of Cycle & Ovulation Pro14. Its optional Max membership is $9.99 a month or $99.99 a year and includes UltrahumanX coverage, with accidental damage, loss and theft support14. Ultrahuman doesn’t state PowerPlug renewal prices after the first term14.

Circular says no subscription is mandatory, but its help center says the advanced parts of blood pressure and glucose are paid3440. Its Circular+ Guarantee add-on is $20 billed yearly34. RingConn lists no subscription for either ring, and Samsung’s Galaxy Ring page lists no fee for the features it describes212228.

None of these makers states a charger’s power draw, so charging electricity is left out of every total. The wearables cost page runs the same three-year math for bands and watches.

Battery, sensors and storage

Ultrahuman, RingConn Gen 3 and Circular include a charging case, and Gen 2 Air comes with a wired dock14212234. Samsung’s ring charges in its Galaxy Ring Charging Case, but Samsung doesn’t say what’s in the box28. Oura sells Ring 5’s Charging Case separately4.

Storage decides how long you can go without opening the app. Ring 5 holds up to 3 days, and Ring PRO up to 250217. Circular’s ring keeps 7 days and then overwrites the oldest, and Circular suggests syncing every 5 to 6 days42.

Sensors, battery, storage, size and water resistance for seven smart rings, from each maker’s pages
RingSensorsBattery and chargingData stored on the ringThickness and weightWater resistance
Oura Ring 5Red, green and infrared LEDs with 2 photodetectors, a temperature sensor and an accelerometer126 to 9 days. About 80 minutes to charge. The Charging Case is sold separately124Up to 3 days22.28 mm thick, from 2 g depending on size12100 m (328 ft), IP68. Oura says it’s not for diving12
Oura Ring 4Red, green and infrared LEDs with 3 photodetectors, a digital temperature sensor and an accelerometer255 to 8 days. A charge takes 20 to 80 minutes, depending on battery level5Up to 7 days22.88 mm thick, 3.3 to 5.2 g depending on size5Up to 100 m (328 ft)5
Ultrahuman Ring PROTemperature sensor, redesigned PPG sensor and 6-axis motion sensor1417Up to 15 days, or up to 45 days between wall charges with the included case. About 2.5 hours to charge141517Up to 250 days, with up to a year backed up to the case14172.65 mm thick (varies by size), 3.3 to 4.8 g1417100 m (328 ft)1417
RingConn Gen 3Optical heart-rate sensor, temperature sensor, 3-axis accelerometer and a vibration motor2110 to 14 days, depending on vibration. About 90 minutes to charge the ring, with the case included2110 days212.3 mm thick, 2.5 to 3.5 g21IP68 and 10 ATM, to 100 m (328 ft). Operating range 32°F to 104°F21
RingConn Gen 2 AirNot listed. RingConn says it tracks heart rate, HRV, SpO2 and skin temperature22Up to 10 days. About 90 minutes on the included wired dock225 to 7 days222 mm thick, 2.5 to 4 g22IP68, to 100 m (328 ft). Operating range 32°F to 104°F22
Samsung Galaxy RingAccelerometer, optical bio-signal sensor and skin temperature sensor28Up to 7 days for sizes 12 and 13 and up to 6 days for smaller sizes. Samsung gives no figure for sizes 14 and 15. Up to 14 days away from an outlet with a fully charged case28UnknownNot stated on Samsung’s ring page2810ATM (100 m for up to 10 minutes) and IP6828
Circular Ring 2Single-lead ECG, optical PPG (green, red and infrared), skin temperature and a 3-axis accelerometer3438About 8 days in power mode. The included wireless case recharges it in about 30 minutes347 days, then the oldest is overwritten422.55 mm and about 4 g on the product page. The science page says 2.6 mm and 4.5 g3438IP6834

Warranty: what each maker covers

Oura includes a 1-year protection plan with both rings and sells upgrades to 2 years for $45 or 3 years for $6046. The Ring 5 product page doesn’t say what the plan covers, such as battery wear, scratches or loss4.

Ultrahuman gives a 12-month limited warranty from delivery15. Its terms exclude batteries and cosmetic damage unless a defect caused the failure16. Loss and theft support comes only with the Max membership14.

RingConn’s warranty runs 1 year from delivery in the US. It excludes normal wear and tear, accidental damage and battery replacement23. Circular’s runs one year from delivery and excludes cosmetic damage and normal wear. It covers the battery only if a defect damaged the ring36. Circular says the battery can’t be replaced and offers a discount code toward a new ring if it weakens41.

Samsung’s Galaxy Ring page gives no warranty length. It links to Samsung’s general warranty page without giving terms28.

Are any of these rings banned in the US?

None is barred from US import, according to US International Trade Commission (ITC) notices through Oct 26, 2026 and a US Customs ruling. Ultrahuman Ring PRO gets in under a Customs ruling with conditions18. Two ITC cases that could lead to import bans, one against Oura and one against Samsung, are still open1333.

Ultrahuman’s US store listed Ring PRO for sale on Oct 23, 202614. RingConn’s US store listed every Gen 3 and Gen 2 Air color and size as available on Oct 202627. TechCrunch reported on March 24, 2026 that Ultrahuman opened US pre-orders after the ruling, and that Oura was weighing appeals20.

US import status of each ring, from ITC notices and a US Customs ruling, checked Oct 20 to 26, 2026
RingUS import status
Oura Ring 4 and Ring 5No exclusion order. In January 2026, the ITC opened Samsung’s patent case seeking to bar imports of Oura wearables (Investigation No. 337-TA-1478). The ITC’s notices through Oct 26, 2026 show the case still open, with no violation finding1113
Ultrahuman Ring PROAllowed, with conditions. On August 21, 2025, the ITC barred imports of Ultrahuman rings that infringe an Oura patent, after finding that Ring AIR did (Investigation No. 337-TA-1398). In March 2026, US Customs ruled that Ring PRO’s redesigned unibody ring falls outside that order. Each import needs a certification that Customs approves1819
RingConn Gen 3 and Gen 2 AirNot barred. The same August 2025 ITC order covered infringing RingConn rings. The ITC removed RingConn from it in December 2025, after RingConn settled with Oura and licensed the patent192425
Samsung Galaxy RingNo exclusion order. In December 2025, the ITC opened Oura’s patent case seeking to bar imports of Samsung smart rings (Investigation No. 337-TA-1468). The ITC’s notices through Oct 26, 2026 show the case against Samsung still open, with no violation finding3133
Circular Ring 2No exclusion order. Circular was named in Investigation No. 337-TA-1398, and the ITC ended the case against it on a settlement in July 202419. Oura says Circular holds a multi-year license, subject to royalties43. Oura’s newer case, 337-TA-1468, doesn’t name Circular31

What the accuracy claims don’t settle

We found no published validation study of any of these seven rings. Oura states 99% heart-rate accuracy, an r² against ECG, and 95% sleep-versus-wake accuracy against a sleep lab18. Oura’s blog traces the heart-rate figure to a 2020 study of 49 adults on an earlier ring8. The paper Oura’s footnote cites for the sleep figure tested a second-generation research ring over 440 nights from 106 people19. It reached 96% for sleep versus wake and 79% across four stages9.

A 2024 sleep-lab study tested the Oura Gen3 ring, not Ring 4 or Ring 5, in 35 healthy adults10. It agreed with polysomnography on 76.3% of 30-second epochs across wake, light, deep and REM sleep10. Agreement on nightly deep and REM totals was low (ICC 0.32 and 0.27, where 1 is perfect agreement)10. Oura funded the study10.

The other makers publish less. Ultrahuman’s FAQ says Ring PRO’s metrics are benchmarked against industry-leading fitness wearables, with no figures or named study15. RingConn gives no accuracy figures for Gen 3 or Gen 2 Air, and presents Gen 3’s vascular and sleep apnea insights as trends and risk indicators2122. Samsung’s Galaxy Ring page gives no accuracy figures for sleep staging, heart rate or skin temperature28.

Circular says its AFib classification uses an algorithm cleared by the FDA, but it names no algorithm maker or clearance number3439. An openFDA search for applicants named Circular on Oct 24, 2026 returned no ring or ECG record44. A clearance held by a supplier wouldn’t show under Circular’s name, though. Circular publishes no accuracy data for its blood pressure estimate, and its science page lists its own validation work as still in review3845.

Ultrahuman, RingConn (for Gen 3) and Circular each say their ring isn’t a medical device152139. Our evidence review covers what independent studies show about sleep staging, overnight heart rate and HRV across devices.

If you’d rather wear a band

Screen-free bands are the other way off Oura’s membership. One line each here, with prices checked on October 13, 2026 (Polar’s on October 23). Our band comparison covers WHOOP, Garmin and Fitbit in depth.

  • Garmin CIRQA is $199.99, and Garmin says it works without a subscription. Garmin rates it at up to 10 days a charge46.
  • Polar Loop is $199.99, and Polar says there are no monthly fees or locked features48.
  • Google Fitbit Air starts at $99.99 with 3 months of Google Health Premium, which then costs $9.99 a month. Premium is optional, and Google says activity and sleep tracking stay free4950.
  • WHOOP Peak goes the other way: WHOOP sells it only as a $239-a-year membership, with the strap included47.

Keep reading

Sources

  1. Oura Ring 5 Oura · manufacturer
  2. Discover Oura Ring 5 Oura · manufacturer
  3. Oura Membership Oura · manufacturer
  4. Oura Ring 5, Silver Oura · manufacturer
  5. Oura Ring 4 Oura · manufacturer
  6. Shop Oura Ring 4: Silver Oura · manufacturer
  7. Return & Exchange FAQs Oura · manufacturer
  8. How accurate is Oura? (Oura blog) Oura · manufacturer
  9. The Promise of Sleep: A Multi-Sensor Approach for Accurate Sleep Stage Detection Using the Oura Ring Sensors (MDPI), 2021
  10. Accuracy of Three Commercial Wearable Devices for Sleep Tracking in Healthy Adults Sensors (MDPI), 2024
  11. Certain Wearable Devices; Institution of Investigation (Investigation No. 337-TA-1478) US International Trade Commission (Federal Register), 2026 · regulator
  12. Notice of a Commission determination not to review an initial determination granting unopposed motion for partial termination by withdrawal of certain patent claims, Investigation No. 337-TA-1478 US International Trade Commission, 2026 · regulator
  13. Commission notices: Investigation No. 337-TA-1478 US International Trade Commission · regulator
  14. Ultrahuman Ring PRO US buy page Ultrahuman · manufacturer
  15. Ring PRO FAQ Ultrahuman · manufacturer
  16. Smart Rings Terms of Sale Ultrahuman · manufacturer
  17. Compare Ring PRO vs Ring AIR Ultrahuman · manufacturer
  18. Ruling HQ H354023: Ultrahuman Ring Pro and the limited exclusion order in Investigation No. 337-TA-1398 US Customs and Border Protection, 2026 · regulator
  19. Notice of the Commission's final determination finding a violation of Section 337, Investigation No. 337-TA-1398 US International Trade Commission (Federal Register), 2025 · regulator
  20. Ultrahuman ramps up US push with Ring Pro as Oura tightens its grip TechCrunch, 2026 · news
  21. RingConn Gen 3 Smart Health Ring | No Subscription RingConn · manufacturer
  22. RingConn Gen 2 Air RingConn · manufacturer
  23. RingConn Return & Refund Policy RingConn · manufacturer
  24. Notice of Commission determination to institute modification and rescission proceedings, Investigation No. 337-TA-1398 US International Trade Commission, 2025 · regulator
  25. ŌURA and RingConn Enter Multi-year Patent Licensing Agreement RingConn, 2025 · manufacturer
  26. RingConn Gen 3 listing on RingConn's store (prices and availability for each option) RingConn · manufacturer · price read from the store’s product data
  27. RingConn Gen 2 Air listing on RingConn's store (prices and availability for each option) RingConn · manufacturer · price read from the store’s product data
  28. Galaxy Ring Samsung US · manufacturer
  29. Buy Galaxy Ring in Titanium Black Samsung US · manufacturer
  30. What is Samsung's return policy? Samsung · manufacturer
  31. Certain Smart Wearable Devices, Systems, and Components Thereof; Institution of Investigation (Investigation No. 337-TA-1468) US International Trade Commission (Federal Register), 2025 · regulator
  32. Notice of Commission determination not to review two initial determinations terminating the investigation with respect to two respondent groups based on settlement agreements, Investigation No. 337-TA-1468 US International Trade Commission, 2026 · regulator
  33. Commission notices: Investigation No. 337-TA-1468 US International Trade Commission · regulator
  34. Circular Ring 2 Circular · manufacturer
  35. Circular Ring 2 listing on Circular's US store (prices for each option) Circular · manufacturer · price read from the store’s product data
  36. Warranty And Returns | Circular Circular · manufacturer
  37. Terms Of Sale | Circular Circular · manufacturer
  38. Science & Validation | Circular Circular · manufacturer
  39. Is the Circular Ring a Medical Device? Circular Help Desk · manufacturer
  40. Which Circular features are free, and which are premium (paid)? Circular Help Desk · manufacturer
  41. Is It Possible to Replace an Old Battery? Circular Help Desk · manufacturer
  42. How much data can I store on the Circular Ring & Account? Circular Help Desk · manufacturer
  43. ŌURA and Circular Sign Multi-year Patent License Agreement Oura (The Pulse Blog), 2024 · manufacturer
  44. openFDA device 510(k) search for applicants named Circular US Food and Drug Administration (openFDA) · regulator · data file
  45. Blood Pressure Trends from a Smart Ring | Circular Circular · manufacturer
  46. Meet CIRQA Smart Band: The screen-free health and fitness tracker from Garmin Garmin Newsroom, 2026 · manufacturer
  47. WHOOP Membership WHOOP · manufacturer
  48. POLAR Loop: Screen-Free Wearable Health Band & Fitness Tracker Polar · manufacturer
  49. Google Fitbit Air Google Store · manufacturer
  50. Google Health Premium with Google Health Coach Google Store · manufacturer

How this was written. Written from the sources listed above, checked . It is general information, not medical advice. Talk to a clinician before acting on anything here if you have a health condition or take medication.

Our editorial policy →