CIRCUL RING
KREISRING
Key Highlights 🌟
- Breakthrough Health Monitoring
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- World’s 1st Clinically Validated BP Monitoring Wearable.
- Blood oxygen monitoring: The only one with real-time updates every second
- Powered by FDA-certified sensor technology
- Adaptive-Fit for 24/7 Comfort
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- Adaptive Sizing, all-day comfort: Follows natural finger size changes
- One Ring, any finger: No need for exact sizing or replacements.
- Expert-Validated Sleep Monitoring
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- The ONLY smart ring validated by OSA clinical studies
- Complies with AASM sleep standards
- Certified medical device by Japan's PMDA
- Lifetime Health Investment
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- One-time purchase for lifetime use
- No monthly subscription fees
- Portable charging case with 120-hour battery life
FREE SHIPPING
1 Year WARRANTY
30 Days RETURNS
SECURE CHECKOUT
PRODUCT FEATURES
- Adaptive-Fit Design for 24/7 Comfort: 🔄 Revolutionary technology automatically adjusts to finger size changes throughout the day. Perfect skin contact ensures accurate readings while maintaining comfort. Fits multiple fingers without sizing kits.
- Clinical-Grade Sleep Apnea Monitoring: 💤 First smart ring validated for sleep apnea detection through OSA clinical research. Tracks oxygen fluctuations with medical precision, delivering personalized sleep improvement recommendations.
- AI-Powered Cuff‑Free BP monitoring：🩺Revolutionary cuff-free blood pressure monitoring with medical-grade accuracy. Just wear and measure—no traditional cuff needed. Validated through thousands of real-world tests for reliable, continuous tracking you can trust.
- Real-Time SpO2 Tracking: 🩸 Unmatched real-time blood oxygen monitoring detects health warnings earlier than traditional minute-interval measurements. Ideal for snorers, altitude travelers, and nocturnal monitoring needs.
- Health Tracking with OTA Updates: 📊 Monitors heart rate, HRV, SpO2, activity, stress, and temperature. OTA updates ensure latest features, while the app provides trend analysis and personalized insights.
- No Subscriptions, Extended Battery: 🔋 One-time purchase unlocks all features permanently. 4-7 day battery life with 120+ additional hours from portable charging case. iOS/Android compatible with Apple Health sync. 5 ATM waterproof.
- Professional Fitness Tracking: 🏃Track your workouts with accuracy matching professional chest straps. Real-time heart rate monitoring, and customizable fitness goals help optimize your training effectiveness, whether in the gym or during daily activities..
SPECIFICATIONS
★ Available Sizes: US 4-16;
★ Weight: S: 5.6g, M: 6.5g, M+: 6.8g, L: 7.1g;
★ Ring Battery Life: 3~7 Days;
★ Charging Box Battery Life: 120+ hours;
★ Compatibility: iOS 12+ and Android 8.0+;
★ Waterproof Class: 5 ATM;
★ Warranty: 1-Year Free warranty;
★ Materials: Premium PVD-coated stainless steel — the same material used in luxury watches.
# 30-tägiges Rückgaberecht
1. Bedingungen für vollständige und teilweise Rückerstattung
2. Nicht erstattungsfähige Situationen
3. Rückgabeprozess
4. Rückerstattungsabwicklung
5. Besondere Hinweise
# Austausch
Wenn das gelieferte Produkt im Originalzustand und unbenutzt ist, Sie es aber gegen eine andere Größe oder Farbe umtauschen möchten, empfehlen wir Ihnen, eine Rücksendeanfrage zu stellen und eine neue Bestellung aufzugeben. Sie tragen alle mit der Rücksendung verbundenen Kosten. Sofern die Rücksendung nicht auf Mängel, Schäden oder Nichtkonformität zurückzuführen ist, werden Versand- und Bearbeitungsgebühren sowie gezahlte Steuern nicht erstattet.
# Erstattung
Eine vollständige Rückerstattung bedeutet, dass Sie den Gesamtbetrag Ihrer Bestellung zurückerhalten, wenn Sie das Produkt gemäß unseren Rückgaberichtlinien zurücksenden.
Sie haben möglicherweise Anspruch auf eine teilweise Rückerstattung, wenn:
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Bei der Überprüfung der Rücksendung stellen wir Schäden, Verunreinigungen, Abnutzungserscheinungen oder fehlende Teile fest. Sofern diese Mängel nicht bereits in Ihrem Rücksendeantrag angegeben wurden, behalten wir uns das Recht vor, den Wertverlust von Ihrer Rückerstattung abzuziehen.
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Sie haben Produktpakete oder Geschenke erhalten. Für eine vollständige Rückerstattung empfehlen wir Ihnen, alle Artikel des Pakets zurückzusenden. Sollten Sie die Artikel nicht zurückgeben können, ziehen wir den entsprechenden Betrag von Ihrer Rückerstattung ab.
Bitte beachten Sie: Sie tragen alle Kosten im Zusammenhang mit der Rücksendung des Produkts, es sei denn, die Rücksendung erfolgt aufgrund von Mängeln, Schäden oder Nichteinhaltung der Vorschriften und Sie haben entsprechende Fotos und Beschreibungen bereitgestellt.
Bearbeitungszeit für Rücksendungen oder Umtausch
Bei Rückgabeanfragen, die unseren Richtlinien entsprechen, veranlassen wir die Rückerstattung umgehend nach Erhalt des zurückgesendeten Produkts. Die Rückerstattung erfolgt über die ursprüngliche Zahlungsmethode und kann bis zu 10 Kalendertage dauern.
#Garantieabdeckung für CIRCUL RING
Für alle Originalkomponenten neuer Produkte gilt in Ländern außerhalb des Europäischen Wirtschaftsraums (EWR) eine einjährige und in EWR-Ländern eine zweijährige Garantie. Reklamationen müssen direkt bei CIRCUL unter Vorlage des Kaufbelegs eingereicht werden. Die Garantie gilt für den Erstbesitzer und ist auf nachfolgende Besitzer übertragbar. Bei Schäden aufgrund von Verarbeitungsfehlern repariert, ersetzt oder erstattet CIRCUL den Kaufpreis.
Ausschlüsse von der Garantiedeckung
Die Garantie deckt nicht ab:
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Unsachgemäße oder fahrlässige Verwendung, Bedienung oder Veränderung.
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Wartung entgegen der Produktpflegeanleitung.
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Normale Abnutzung.
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Wiederaufladbare Batterien haben eine begrenzte Lebensdauer und gelten als Verbrauchsmaterial. Ein Batteriewechsel ist nicht in der Standardgarantie enthalten.
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Schäden oder Mängel, die durch Unfälle verursacht wurden.
# Erweiterte Garantiebedingungen von Circul Ring
1. Leistungsübersicht:
Mit dem Kauf dieser Garantieverlängerung verlängert sich die Grundgarantiezeit Ihres Smart Rings. Die genaue Dauer richtet sich nach der gewählten Serviceart. Während der Garantieverlängerung profitieren Sie von einem kostenlosen Produktaustauschservice zum gleichen Standard wie während der ursprünglichen Garantiezeit.
2. Geltungsbereich:
Kostenloser Ersatz durch ein neues Produkt ist bei Herstellungsfehlern (einschließlich Sensorfehlern, deutlicher Verschlechterung der Akkulaufzeit, Material- und Verarbeitungsfehlern usw.) und Funktionsstörungen, die bei normalem Gebrauch auftreten, möglich. Probleme, die durch Firmware-Upgrades über die App behoben werden können, sind jedoch nicht von dieser erweiterten Garantie abgedeckt.
3. Ausschlüsse:
Von Menschen verursachte Schäden durch Stürze, Eindringen in Wasser, Quetschungen usw. aufgrund der Nichtbeachtung der offiziellen Betriebsanleitung; Fehlfunktionen durch unbefugte Demontage, Modifikation oder Verwendung nicht offizieller Zubehörteile; optische Abnutzung und normale Alterung von Verbrauchsteilen (wie Ladekabeln) sind alle von der erweiterten Garantie ausgeschlossen.
4. Serviceprozess:
Sollten während der verlängerten Garantiezeit Probleme mit Ihrem Produkt auftreten, können Sie über die offizielle App oder den Kundendienst einen Kundendienst beantragen. Folgen Sie den Anweisungen zur Rücksendung des Produkts. Nach Überprüfung der Produktgarantie erhalten Sie innerhalb von 10 Werktagen ein neues Ersatzprodukt.
5. Zusätzliche Hinweise:
Dieser erweiterte Garantieservice ist nicht übertragbar und gilt nur für den ursprünglich erworbenen Smart Ring. Nach Inkrafttreten des Services werden keine Rückerstattungen mehr unterstützt. Das Unternehmen behält sich das Recht der endgültigen Auslegung und Änderung der erweiterten Garantiebedingungen vor. Die Benutzer werden über alle Änderungen auf offiziellem Wege informiert.
Overview
HRV Precision.
Millisecond Accuracy
One Ring, Any Finger
50 Meters
Water-resistance
Sleep Apnea
Analysis
A Clinical Lab
Wrapped around
Your Finger.
Up to 7 days
Adaptive design
24/7 All-day comfortable fit
Multiple excercise models
SST™ Ultra 2.0 sensors
Subscribe for FREE !
Continuous SpO2 Tracking
All Features
Achieves millisecond-level accuracy, continuously analyzing heart rate variability, which is invaluable for evaluating overall health and stress levels.
Offers real-time tracking with second-level updates help users to assess respiratory health.
Updates data every second with an accuracy of ±2 bpm, providing highly accurate heart rate information to help users promptly identify cardiac health abnormalities.
Achieves an accuracy of ±0.1°C, updating every minute to quickly detect temperature anomalies, especially during menstrual cycle tracking and flu seasons or pandemics.
Sleep Apnea Detection: Capable of identifying the risk of sleep apnea, aiding in the early detection of potential sleep issues.
Lightweight design, support for sleep wear, provide complete sleep data
Real-Time Sleep Monitoring: Thoroughly analyzes sleep stages, including light, deep, and REM (rapid eye movement) sleep, offering detailed sleep quality reports to help improve sleep habits.
Cuff‑free technology lets you measure blood pressure in seconds—no bulky arm cuffs required. Leveraging our lab‑grade, AI‑powered 125 Hz PPG algorithm, each one‑tap reading delivers lab‑caliber accuracy you can trust.
Auto-sync your readings to the app, where interactive trends and detailed reports help you track daily and long-term patterns.
Soon, Circul Ring will introduce always-on, on-device blood pressure monitoring—no taps needed—making it the world’s first truly “wear-and-forget” BP monitor.
Supports monitoring up to 5 types of activities, such as running and cycling
Tracks exercise heart rate during workouts, providing real-time data and post-exercise analysis to help optimize performance.
Whether you're a runner or yoga lover, CIRCUL is designed to help you achieve your activity goals. With over 5 sports modes, it provides real-time heart rate feedback and detailed post-workout analysis. 90% of users report significant progress.
Achieving millisecond-level accuracy, providing continuous analysis of heart rate variability, which is invaluable for assessing overall health and stress levels.
Assesses stress levels through continuous high-resolution heart rate variability (HRV) metrics.
Offers de-stressing and relaxation recommendations based on stress data.
CIRCUL watches over you 24/7. Detecting arrhythmias and oxygen dips in real-time. Day or night, it's your silent guardian. Catch potential issues early. Stay ahead of your health.
More than numbers. ClRCUL reveals your wellness story. Heart rate trends. Sleep patterns. Stress insights. All in one comprehensive, shareable report. Empower your choices. See your health clearly.
How we compare
| Product |
Circul Gen 2
|
Oura Ring 4
Oura Ring 4
|
Ringconn Gen 2
|
Ultrahuman Ring AIR
|
| Price | |||||||
| Price |
$249
(As low as $0.54/day)
|
$349
|
$299
|
$349
|
|||
| Subscription Free | |||||||
| Subscription Free |
Free
|
$5.99/month or
$69.99/annually |
Free
|
Free
|
|||
| Ring Size | |||||||
| Ring Size |
4
modles
cover 13 sizes
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12
sizes
|
9
sizes
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10
sizes
|
|||
| Structure | |||||||
| Structure |
Adaptive-fit,
flexible and adjustable, precise monitoring. One ring, any finger.
|
Fixed Design
reducing accuracy
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Fixed Design
reducing accuracy
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Fixed Design
reducing accuracy
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| Sensors | |||||||
| Sensors |
Advanced PPG
Technology
Calibrated to clinical-grade
ECG standards. |
Heart Rate,
Temperature, Accelerometer |
Standard PPG
Sensor
Conventional Technology
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Standard PPG
Sensor
Conventional Technology
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| Certifications | |||||||
| Certifications |
CFDA Registered，
Japan's PMDA medical device standards |
Consumer-Grade
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Consumer-Grade
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Consumer-Grade
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Advanced Monitoring Features
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| Sleep Apnea Analysis | |||||||
| Sleep Apnea Analysis |
The ONLY smart ring
validated by OSA clinical studies |
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Standard tracking
|
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| Sleep Analysis | |||||||
| Sleep Analysis |
Clinical Validation
Meets AASM sleep
medicine guideline |
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| Heart Rate Variability (HRV) | |||||||
| Heart Rate Variability (HRV) |
Real-Time, Second-Level tracking
Ultra-Detailed HRV Metrics
9 Core metrics (SDNN, rMSSD, pNN50, SDANN etc.)
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Nocturnal monitoring only
Single Basic HRV metric
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Single Metric: RMSDD
1-2 Basic HRV metrics
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Dynamic tracking
via SDNN, RMSSD metrics 2 Basic HRV metrics
|
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| Blood Pressure | |||||||
| Blood Pressure |
World’s 1st Clinically Validated
BP Monitoring Wearable* |
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| Heart Rate（HR） | |||||||
| Heart Rate（HR） |
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| Activity Tracking | |||||||
| Activity Tracking |
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| Stress & Energy Management | |||||||
| Stress & Energy Management |
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| WEB Personal Data Center | |||||||
| WEB Personal Data Center |
180 days of historical data*
|
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“The adjustable size was important to me because my fingers sometimes swell, making other rings uncomfortable. I appreciate that this company has experience with smart rings and FDA approval, which should ensure better quality than newer brands.”
Gavin Hall
Medical Scientist
“My biggest problems with rings is the size. Finally, someone has invented the Smart ring that I can actually wear. My ex football teammates will be quite happy. Nobody has small finger joints that most fit rings over! Thank you!!!!”
Charlie Martin
Medical Scientist
“I’ve been looking for the RIGHT smart ring for some time now, this ring checks all the boxes for me. I’ve struggled with high blood pressure, rings fitting one day but not the next, so the adjustable size is awesome as well as continuous blood-pressure monitoring! ”
Robert Palumbo
Health and Wellness Coach
“This would be my first smart ring I think it’s the most stylish I’ve seen and I love the flexible design, for the functionality I am really looking forward to the health tracking I have some things that this rings tracking will help me with very much…I think this is why it’s a great product”
Benjamin Shullaw
Corporate Executive
“I like the ring because of the flexible sizing and being able to use different fingers. I also wanted one able to show BP and other medical functions. It is a nice looking ring and the colours available are very nice….Shared…”
James Lauzier
Freelancer
Parameter
SST™ Ultra 2.0 Sensors
Advanced PPG Technology — Calibrated to clinical‑grade ECG standards
Flexible photoelectric sensors
3‑wavelength photoelectric sensors
G‑sensor
High‑precision temperature sensor
Green LEDs (heart‑rate monitoring)
Red & infrared LEDs (SpO₂)
Materials (Inner & Outer)
Non‑allergenic stainless‑steel inner with medical‑grade hypoallergenic epoxy coating — comfortable for all‑day wear.
Minor surface scratches from regular use are normal over time
Compatibility
Ring weight: 5.6–7.1 g (varies by size)
S: US ring size 4-7
M: US ring size 7.5-9
M+: US ring size 9.5-11.5
L: US ring size 12-15
Charging case weight: 38 g
Compatibility
iOS and Android
Integrates with Apple Health
Circul Ring app available in English and Japanese
No subscription fee
Battery
5–7 days of battery life (built‑in 3.8 V Li‑ion battery)
Full charge in 60–90 minutes
Charging case battery: 230 mAh (up to 3 full charging cycles; extends total life to 28 days)
Connectivity
Bluetooth Low Energy (BLE 5)
Automatic firmware updates via the Circul Ring app
Reliability
100,000‑cycle mechanical service‑life test
200 N tensile‑strength test
PMDA certified
Waterproof Rating
5 ATM (up to 50 m / 164 ft)
Warranty
1‑year free warranty
What's in the box
circul ring *1
Charging Cradle *1
Type-c charging cable *1
MANUAL *1
Still Got Questions?
Please read our FAQs page to find out more. Still have questions ? Contact our customer support.
CIRCUL RING features Elite Modes designed for users with sleep disorders or conditions requiring overnight blood oxygen monitoring, providing medical-grade SpO₂ monitoring at 1-second intervals. Due to the increased power consumption from these intensive calculations, battery life in this mode is approximately 3-7 days. Additionally, the CIRCUL RING comes with a charging case that has an embedded battery, allowing you to charge the ring anytime, with a charging time of approximately 60 minutes from 0% to 100%.
Overall, you can enjoy 3-7 days of battery life per charge, plus an additional 120 hours with the portable charging case. 🔋The CIRCUL RING, building on the FDA-grade sensor technology of the original Circul+, is designed for precise and comfortable health monitoring. Our proprietary SST™ (Sensor Stabilization Technology) ensures unparalleled data precision, adapting to natural finger size variations of up to 3mm throughout the day.
It provides Near-Medical-grade Health Data with Real-time Tracking at Second-level Intervals, ensuring that critical indicators such as heart rate, real-time blood oxygen, HRV, and blood pressure meet industry-leading accuracy standards.
- Sleep Apnea monitoring
- Blood Pressure
- Blood Oxygen Levels (SpO2)
- High Precision HRV monitoring
- Heart Rate (24/7 Continuous monitoring)
- Temperature
- Real-time Sleep Monitoring
- Exercise Heart Rate
- Activity Tracking
- Steps and Movement
- Energy & Stress
- Check whether the ring is charged fully.
- The distance between CIRCUL and Mobile is within 10cm for bluetooth connection.
- Check whether the Bluetooth function of the mobile phone is turned on.
- Whether the Bluetooth permission of the APP in the phone settings is turned on
- Disassociate ring in APP firstly, and then re-add the ring again
- Try to uninstall and reinstall the “CIRCUL RING” APP, and choose to allow all app permissions during the installation process,otherwise some functions may be unavailable.
To avoid channel conflicts, we operate these products under distinct brand identities to ensure clear differentiation in our product lines. While both CIRCUL+ (CIRCUL Pro) and CIRCUL RING target different markets and applications, they are part of the BodiMetrics smart ring series.
Customer Reviews
Everything from sales to delivery was excellent
More activities ( indoor cycling, for example) would be Great, I am Not sure, if the activity burn is correct, seems a bit low to me.
Comfortable and adaptable sizing. Looks nice. Works well with great features.
The Circul ring app recently updated and there's been a definite improvement in sleep tracking capability, specifically with naps. It now meets all my sleep tracking needs and IMHO provides excellent SpO2 data for all my sleep needs. 3 points to consider for improvement: step counts (still seems off but for me this is minor), sleep vs awake (not sure if this is doable but again for me this is minor), and exercise activity tracking (this is major for me; there are too few options; I would really like a rowing option, as well as a "wildcard" i.e. Other___, and fill in the blank). I know we can add a tag later, but I would love if there were other options such as rowing that the ring was calibrated for! Overall, the improvements have been great, and I can't wait to see the Arrhythmia and swimming tracking, which are currently in progress!
I like that you can check your oxygen saturation (it wasn't on my Fitbit or Apple watch that I've used before). But it would be nice to have a graph of O2sat like it does for HR, which I would be especially interested in while sleeping. I like that it tracks sleep. I thought that the ad for it mentioned detecting sleep apnea but I don't see anything that would indicates that it actually does. It's a little bulky for a ring so it's mildly uncomfortable at times. It should have some kind of mark on the outside of the ring so the wearer can tell easily if it is in the correct position and hasn't rotated. It doesn't detect activity well, e.g. I rode a stationary bicycle for 40 min and it recorded 15 min. On the app one can tell it when you start and stop an activity but I was hoping that it would be accurate enough that it wouldn't be necessary. The charging seems to work well and doesn't take long. I wish the instructions were a little more detailed on how careful to be with the ring, e.g. can lotion or sunscreen over time affect the operation of the ring.
