CIRCUL RING
CIRCUL RING 2 MAX (Fully Upgraded)
Key Highlights 🌟
- Breakthrough Health Monitoring
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- True Continuity · Real-Time · Professional-Grade Monitoring.
- World’s 1st Clinically Validated BP Monitoring Wearable. (For wellness and research purposes only)
- Blood oxygen monitoring: The only one with real-time updates every second
- Powered by FDA-certified sensor technology
- Unique Heart Health Index aggregates HR, HRV, and rhythm trends for a clear overview.
- 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
- Monitors nightly oxygen fluctuations, calculates sleep debt, and provides bedtime and nap alerts.
- Certified medical device by Japan's PMDA
- Lifetime Health Investment
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- One-time purchase for lifetime use
- No monthly subscription fees
FREE SHIPPING
1 Year WARRANTY
30 Days RETURNS
SECURE CHECKOUT
PRODUCT FEATURES
- Adaptive-Fit Design for 24/7 Comfort: 🔄 Revolutionary adaptive technology automatically adjusts to changes in finger size, ensuring accurate readings while maintaining a comfortable fit.
Fits multiple fingers, no sizing kits required.
- True Continuity · Real-Time · Professional-Grade Monitoring: 🩸Tracks heart rate, HRV, stress, and energy levels all day. Data updates every second. HRV metrics (SDNN, RMSSD) <5% deviation, offering long-term trend and recovery reference.
- Unique Heart Health Index 🌟Aggregates heart rate, HRV, and rhythm trends for a clear overview of heart state, supporting daily wellness insights.
- Professional-GradeSleep Apnea Risk Assessment: 💤 Monitors overnight blood oxygen fluctuations and provides personalized sleep apnea risk assessment (for wellness trend reference only). Calculates sleep debt and offers bedtime and nap reminders to support better sleep habits and recovery.
- AI-Powered Cuff‑Free BP monitoring：🩺Revolutionary cuff-free blood pressure monitoring with lab-grade accuracy. Validated through thousands of real-world tests for reliable tracking you can trust.(For research and innovation purposes only)
- Women’s Cycle Insights (Full Upgrade in 2026) 🌸
Phase 1 (2025): Basic cycle tracking (temperature + HRV + heart rate) with manual cycle logging.
Phase 2 (2026): Full-featured cycle monitoring — ovulation prediction, symptom logging, and personalized alerts.
- No Subscriptions, Extended Battery: 🔋 One-time purchase unlocks all features permanently. 7-day battery life, one week worry-free. Compatible with iOS/Android and Apple Health. 5 ATM water resistance.
- Professional Fitness Tracking: 🏃Real-time Exercise Heart Rate monitoring with customizable training goals. Accuracy matches chest-strap monitors. In 2026, “Plan + Reminders + Logging” will be added for professional-grade workout management.
- Health Tracking with OTA Updates: 📊 Monitors heart rate, HRV, Blood Oxygen, activity, stress, and temperature. OTA updates ensure latest features, while the app provides trend analysis and personalized insights.
SPECIFICATIONS
★ Available Sizes: S: US 6–9.5; M: US 10–13; L: US 13.5–18+
★ Weight: S: 5.6g, M: 6.5g, M+: 6.8g, L: 7.1g;
★ Ring Battery Life: 7 Days (in TRULY continuous mode);
★ Charging Box Battery Life: 120+ hours (in 2026 Q1);
★ Compatibility: iOS 12+ and Android 8.0+;
★ Waterproof Class: 5 ATM, short-term immersion (<1 hour);
★ Warranty: 1-Year Free warranty;
★ Materials: Premium PVD-coated stainless steel — the same material used in luxury watches.
★ Data Storage: Stores up to 3 days of data (depending on usage). Daily sync with the app is recommended.
How to Choose Your Size
(Note: If your size falls between two numbers, choose the larger size for a looser fit or the smaller size for a snugger fit.)
Step1
Take a length of floss or string and wrap it around the base of your finger.
Step2
Mark where the floss or string first overlaps with a pen.
Step3
Stretch the length of string out along a ruler or measuring tape, and take down the length in millimeters
Step4
The length you measured is the circumference of your finger, compare the circumference of your finger the following table.
# 30-Day Return Policy
1. Full and Partial Refund Conditions
2. Non-Refundable Situations
3. Return Process
4. Refund Processing
5. Special Notes
# Exchange
If the item you received is unused and in its original condition, and you would like to exchange it for a different size or color, you have two options:
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Exchange (Recommended):
Please contact our customer service team directly. If the item meets our return and exchange criteria, we will assist you in exchanging it for the desired size or color.Please note that you will be responsible for the shipping cost of the exchange. -
Return and Reorder:
You may also choose to submit a return request and place a new order for the desired item.
In this case, unless the item has a quality issue or was damaged during shipping, any previously paid shipping fees, handling charges, or taxes will not be refunded.
Important Notes:
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Please contact our customer service team first to confirm your eligibility and obtain the correct return address before sending any item back. Do not return any product without authorization—unauthorized returns will not be processed, and any resulting risks or costs will be your responsibility.
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Exchange requests are subject to product availability. To ensure that the item you want is still in stock, we recommend reaching out to us as soon as possible.
# Refund
A full refund means you will receive the total amount of your order back if you return the product according to our return policy.
You may be eligible for a partial refund if:
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We find any damages, contamination, wear and tear, or missing parts upon inspecting the returned product. We may deduct the devaluation amount from your refund unless these issues were declared in your return request.
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You received bundled products or gifts. To receive a full refund, we recommend returning all bundled items. If you cannot return them, we may deduct the corresponding amount from your refund.
Please note: You will be responsible for all costs associated with returning the product unless the return is due to defects, damages, or non-compliance, and you have provided supporting photos and descriptions.
Processing Time for Returns or Exchanges
For return requests that comply with our policy, we will initiate the refund immediately upon receiving the returned product. The refund will be processed through the original payment method and may take up to 10 calendar days.
#Warranty Coverage for CIRCUL RING
All original components of new products are covered by a 1-year warranty in non-European Economic Area (EEA) countries and a two-year warranty in EEA countries. Claims must be made directly to CIRCUL with proof of purchase. The warranty applies to the original owner and is transferable to subsequent owners. If damage is due to craftsmanship defects, CIRCUL will repair, replace, or refund.
Exclusions from Warranty Coverage
The warranty does not cover:
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Improper or negligent use, operation, or modification.
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Maintenance contrary to product care instructions.
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Normal wear and tear.
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Rechargeable batteries, which have limited lifespans and are considered consumable items. Battery replacement is not included in the standard warranty.
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Damage or defects caused by accidents.
# Circul Ring Extended Warranty Terms
1. Service Overview:
After purchasing this extended warranty service, the basic warranty period of your smart ring will be extended, with the specific duration determined by the service type you select. During the extended warranty period, you can enjoy free product replacement service at the same standard as the original warranty period.
2. Coverage:
Free replacement with a brand new product is available for manufacturing defects (including sensor malfunction, significant battery life deterioration, material and workmanship defects, etc.) and functional failures that occur during normal use. However, issues that can be resolved through firmware upgrades via the APP are not covered by this extended warranty service.
3. Exclusions:
Human-caused damage resulting from drops, water immersion, crushing, etc. due to failure to follow official operating instructions; malfunctions caused by unauthorized disassembly, modification, or use of non-official accessories; appearance wear and normal aging of consumable parts (such as charging cables) are all excluded from the extended warranty coverage.
4. Service Process:
If your product experiences issues during the extended warranty period, you may apply for after-sales service through the official APP or Customer Support. Follow the instructions to return the product, and after verification that it meets the conditions, a brand new replacement product will be shipped to you within 10 business days.
5. Additional Notes:
This extended warranty service is non-transferable and applies only to the originally purchased smart ring; no refunds are supported after the service becomes effective; the company reserves the right of final interpretation and modification of the extended warranty terms, and users will be notified of any modifications through official channels.
Overview
Real-Time Tracking
data updates every Second.
One Ring, Any Finger
All-Day Comfort
Sleep Apnea detection
Enhanced Sleep & Recovery Management
50 Meters
Water-resistance
World’s First: AI-Powered
Blood Pressure
measurement
7 days battery life
Tracks Sleep Debt
with bedtime and Nap reminders
Body Energy Score
Reveals what drains your energy
SST™ Ultra 2.0 sensors
Professional Precision
Subscribe for FREE !
Women’s Cycle Tracking
(will be Full Upgraded in 2026)
All Features
Advanced algorithms ensure each HRV change is captured precisely. Long-term trends are easy to see, letting you feel your recovery and readiness.
Continuous HR and HRV tracking captures every nuance of your body’s rhythm. Feel the flow of your day and understand your body like never before.
providing highly accurate heart rate information (with accuracy of ±2 bpm) to help users promptly identify cardiac health abnormalities.
Get real-time health updates, with temperature monitoring accurate to ±0.1°C to quickly detect changes, especially during menstrual cycles and flu seasons.
Measure blood pressure in seconds with no bulky arm cuffs required. Powered by our lab-grade AI-driven 125 Hz PPG algorithm.
(Note: this feature is intended for research and innovation purposes only.)
View trends anytime to understand your body’s changes. *Data is intended for personal health and research reference, not as a medical diagnosis.
Our upcoming automatic BP monitoring uses on-device AI for local, network-free analysis with no manual input. It turns manual checks into a seamless “wear-and-forget” experience, providing continuous and effortless BP protection.
See how your body and mind are holding up, whether you’re just waking up, tackling a busy morning, or winding down in the evening.
Know when your energy dip is caused by physical fatigue, poor sleep, or intense activity, or by mental load, emotional tension, or a stressful day.
Get gentle cues to adjust your pace—take a short break, hydrate, or focus on recovery—so you can maintain your best rhythm throughout the day.
Analyse nightly blood oxygen fluctuations, provides a personalized assessment of your Sleep Apnea risk.
See accumulated sleep debt and receive helpful bedtime or nap reminders. Make better decisions for rest and recovery every day.
Capture oxygen levels and sleep phases throughout the night for a detailed picture of your sleep quality.
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 detailed post-workout analysis. 90% of users report significant progress.
Track temperature, HRV, and heart rate with easy period tagging. Understand your body’s rhythm and spot early trends.
Predict ovulation, fertile windows, and log symptoms with personalized alerts. Long-term trends give a clear picture of your monthly cycle.
What Our Testers Are Saying
Gavin Hall
“The adjustable size was important to me because my fingers sometimes swell, making other rings uncomfortable. Battery lasts almost a week! I don’t have to worry about charging every night, which is a huge relief.”
Medical Scientist
James W.
"Finally, I can track my heart rate continuously and see trends I never noticed before! The insights I've gained from the Gen 2 MAX have transformed how I approach my fitness routine. I now know my body better. "
Data Analyst
Sarah Johnson
"The women’s cycle tracking is surprisingly accurate and helpful. It really makes planning easier. With the NEW Gen ring, I feel empowered to manage my health with confidence, knowing I have reliable data at my fingertips!"
Health and Weallness Coach
Benjamin Shullaw
"The sleep debt reminders actually help me go to bed on time. I feel more rested and focused. Since upgrading to the Gen 2 MAX, my sleep quality has improved significantly, and I wake up feeling refreshed and ready to tackle the day!"
Corporate Executive
Charlie Martin
“The NEW Gen Ring is incredibly comfortable, even for arthritic fingers, and provides real-time HRV and heart rhythm data to help understand workout effects. Thank you!!!!”
IT Project Manager
Parameter
SST™ Ultra 2.0 Sensors
Advanced PPG Technology;
Green / Red / Infrared LEDs;
G-sensor (accelerometer);
High-precision temperature sensor
Materials
Non-allergenic 316L stainless steel with PVD coating;
Luxury watch-grade material suitable for daily wear.
Weight
Ring weight: varies by size
S: US ring size 6–9.5
M: US ring size 10–13
L: US ring size 13.5–18+
Compatibility
iOS and Android
Integrates with Apple Health
No subscription fee
Battery
7 days of battery life;
Built-in 25 mAh Li‑ion battery;
Full charge in < 90 mins via USB‑C.
Reliability
100,000-cycle lifespan test;
200 N tensile strength test;
PMDA certified;
Security & Data Storage
Ring stores up to 3 days of data; Daily sync recommended.
What's in the box
CIRCUL RING 2 MAX *1
Magnetic Charging Base *1
Type-c charging cable *1
Quick Start Guide *1
Still Got Questions?
Please read our frequently asked questions to find out more.
Q1. Is it capable of continuously monitoring my health?
Yes, 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.
Q2. What metrics does Circul Ring track?
- Heart Rate (24/7 Continuous monitoring)
- Blood Oxygen Levels (SpO2)
- High Precision HRV monitoring
- Sleep Apnea monitoring
- Temperature
- Blood Pressure
- Real-time Sleep Monitoring
- Exercise Heart Rate
- Activity Tracking
- Steps and Movement
- Energy & Stress
- Women’s Cycle record
Q3. How long does the battery last? 🌟
The CIRCUL RING features medical-grade tracking at 1-second intervals. Due to the increased power consumption from these intensive calculations, the battery life in this mode is approximately 7~9 days per charge.
Q4. What makes Circul Ring different from other smart rings?
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.
Q5. Do I need a subscription?
No. All key features are included, no recurring fees required.
Q6. When will women’s cycle features launch?
Basic temperature tracking, combined with HRV, HR, and manual tagging for smarter cycle tracking, will launch with the Circul Ring 2 MAX in 2025; full-featured Women’s Cycle Tracking — including ovulation prediction, symptom logging, and personalized alerts — will launch in 2026.
Q7: How many generations of the CIRCUL RING are there?
Here’s how our smart ring lineup has evolved over time:
- Circul (2018/2019):
Our first self-adjusting smart ring, designed primarily for sleep tracking. - Circul+ (2020/2021):
Added sensors and improved data precision, still focused on clinical monitoring. - CIRCUL RING 2 (2024):
A complete redesign for everyday use, with upgraded hardware and all-day tracking. - CIRCUL RING 2 MAX (2025):
The latest refresh of CIRCUL RING 2 — offering enhanced comfort, refined algorithms, and an improved overall user experience.
Q8: So what’s the difference between CIRCUL RING 2 and CIRCUL RING 2 MAX? 🌟
CIRCUL RING 2 MAX is an enhanced version of the current CIRCUL RING 2.It features improved comfort, upgraded firmware and algorithms, and refined sensor optimization for even better daily tracking accuracy. Think of it as a premium refresh, not an entirely new model.We’ve also prepared a detailed feature upgrade and compatibility chart so you can clearly see how CIRCUL RING 2 MAX builds upon the CIRCUL RING 2 and what improvements are supported on each model.
Q9: Is my CIRCUL RING 2 still supported?
Absolutely. CIRCUL RING 2 continues to receive firmware updates and full app support. The CIRCUL RING 2 MAX simply builds upon this foundation with hardware and design refinements.
Q10: Will there be changes in the app or data platform?🌟
Yes — alongside the launch of CIRCUL RING 2 MAX, we will release a major firmware update for the existing CIRCUL RING 2, as well as a redesigned CIRCUL RING app.
These updates will deliver more stable firmware performance, improved algorithms, and an upgraded user experience — while keeping all your historical data intact.The new CIRCUL app introduces enhanced visuals and new features, and even if you’re using the current CIRCUL RING 2, you’ll still enjoy full compatibility and access to core improvements.
Q11. My ring readings seem inaccurate?
It’s common for wearable devices like Circul Ring to have occasional variations in step count, blood oxygen, blood pressure, or sleep data. Factors such as how you wear the ring, movement during measurement, skin type, and environmental conditions can affect accuracy. To get the best results, please ensure the ring fits properly, stay still during measurements, and keep your app updated. These readings are meant to support your health awareness and are not a substitute for professional medical tests. For more details and tips, please see our full FAQ on reading accuracy.
Q12. What’s the difference between CIRCUL RING and Circul+ (Circul Pro)?
CIRCUL+ is an FDA-certified pulse oximeter primarily designed for clinical and sleep-monitoring use.CIRCUL RING, on the other hand, brings the same core sensing technology to everyday users. It’s optimized for all-day health management, including heart rate, HRV, stress, and activity tracking — catering to a broader, lifestyle-focused audience.To keep things simple and avoid overlap, these products are operated under distinct brand identities but both belong to the BodiMetrics smart ring family.
