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Details
Circular Ring 2 combines a jewelry design with tracking of 140+ biosignals across 13+ health features - including ECG, AI coaching, sleep, activity, recovery and more. Unlike trackers that only show numbers, Circular pairs data with Kira, your personal AI health coach, who translates trends into simple, actionable advice. A health lab on your finger, with a subscription-free experience and premium features like blood pressure and glucose trend coming soon.Circular Ring sizes are different from standard ring sizes. We recommend finding your size before purchasing your ring. Purchase our Circular Ring sizing kit to find your optimal size, then come back and order the right size. Sizing Tips - Circular Ring 2 is available in 9 sizes, from US 6 to US 14 (no half sizes). Ring sizes run about one half size above standard ring sizes. For example, if you normally wear a size 9, we recommend choosing a size 10.You can wear the Circular Ring 2 on any finger, but all four fingers aside from the thumb give the most accurate readings. The thumb still works but with less precision. The Circular ring is best worn on your non-dominant hand.Finger size changes during the day! Sizing is most accurate midday.The Circular logo of the ring should face the top of your finger, and the flat sensor part should face your palm.Between Sizes?Choose the larger size but make sure it’s snug enough not to fall off. If you have large knuckles, choose the smallest size that slides over them comfortably.Highlights - Size Before You Buy- Order a Circular sizing kit to find your optimal size, then come back and purchase your Circular Ring 2.Designed Not to Distract - No lights, no buzzes, just a luxury ring that fits seamlessly into your daily life with no distractions.Battery & Charging - Wear it for up to 8 days straight. Then wirelessly recharge in just 30 minutes.Designed for daily wear - Titanium body, hypoallergenic interior- Finished with a durable PVD coating protecting it from scratches and wear. Circular Ring 2 is fully waterproof, safe for swimming, showering, and daily wear.No Subscription Required - All 13+ health core features and 140+ biometrics are free forever. Only a small number of premium features use a freemium model (free & paid partially with coins or money). All the core features are free, no subscription required.Kira™ Coaching - The Circular Ring captures over 8 key health signals and the app turns those readings into clear, easy to understand insights. You see patterns in your recovery, energy, stress, and sleep without needing to decode anything. Kira, your AI health coach, watches for any changes in your vitals, spots early warning signs, and sends you gentle, helpful recommendations. No searching. No guessing. Kira already knows what matters and what to do next. Features
Blood Pressure Monitoring - Track your blood pressure trends. Understand how stress,sleep, and activity affect your heart health over time. Coming as a premium feature in early 2026.
Glucose Trend Monitoring - Stay ahead of your blood sugar fluctuations with non-invasive tracking. Ideal for those managing energy levels, metabolism, or early glucose sensitivity. Planned for mid 2026, as a premium feature.
ECG + AFib Detection - Track your heart rhythm with world’s first medical-grade technology and catch signs of arrhythmia before symptoms appear.
Sleep Tracking - Monitor sleep stages, breathing, and oxygen levels to understand how well your body recovers overnight.
Women’s Health - Keep track of your cycle, hormonal shifts, and fertility with personalized insights based on your vitals.
Stress & Energy Monitoring - See how stress affects your body and get guidance on when to rest or push harder.
Advanced analytics - Make graphs overlap and understand how different metrics are linked.
Energy monitoring - Get stats and in depth insights about your energy levels.
Live measurement - On-demand spot measurement for HR, SpO2, HRV, activity intensities, and Max HR.
Alarm clock - Wakes you up with a smart alarm during your lightest sleep stage with your phone's vibrations.
Guided breathing - Launch guided breathing exercises to relax, sleep better, and more.
Vital alerts - Get notified when you vitals are going off.
Medication - Never forget to take your meds anymore and keep track of your intakes.
Coherence - Dive into a state of optimal function and regulate your emotions and clarity.
Sport Sessions - Track outdoor activities with a GPS trace and reports.
Airplane Mode - Disable ring’s Bluetooth communication.
Timer - Set a timer for your workout or anything else.
Calendar - Add manual notes that are reflected in the app and add context to your data.
https://shop.simon.com/products/circular-ring-2-smart-ring-size-before-you-buy8932331782204Circular Ring 2 - Smart Ring - Size Before You Buy549.00//shop.simon.com/cdn/shop/files/bd5f96aaba2646e68ec69648f72195ba.jpg?v=1780086451//shop.simon.com/cdn/shop/files/bd5f96aaba2646e68ec69648f72195ba_large.jpg?v=1780086451USDInStockelectronics/wearable-technology/wearable-technology-accessories2W BrandsAll ProductsAuto Brands 1ElectronicsElectronics - Wearableselectronics/wearable-technology/wearable-technology-accessoriesFinal FewNew Arrivals Under $500
Circular Ring 2 combines a jewelry design with tracking of 140+ biosignals across 13+ health features - including ECG, AI coaching, sleep, activity, recovery and more. Unlike trackers that only show numbers, Circular pairs data with Kira, your personal AI health coach, who translates trends into simple, actionable advice. A health lab on your finger, with a subscription-free experience and premium features like blood pressure and glucose trend coming soon.Circular Ring sizes are different from standard ring sizes. We recommend finding your size before purchasing your ring. Purchase our Circular Ring sizing kit to find your optimal size, then come back and order the right size. Sizing Tips - Circular Ring 2 is available in 9 sizes, from US 6 to US 14 (no half sizes). Ring sizes run about one half size above standard ring sizes. For example, if you normally wear a size 9, we recommend choosing a size 10.You can wear the Circular Ring 2 on any finger, but all four fingers aside from the thumb give the most accurate readings. The thumb still works but with less precision. The Circular ring is best worn on your non-dominant hand.Finger size changes during the day! Sizing is most accurate midday.The Circular logo of the ring should face the top of your finger, and the flat sensor part should face your palm.Between Sizes?Choose the larger size but make sure it’s snug enough not to fall off. If you have large knuckles, choose the smallest size that slides over them comfortably.Highlights - Size Before You Buy- Order a Circular sizing kit to find your optimal size, then come back and purchase your Circular Ring 2.Designed Not to Distract - No lights, no buzzes, just a luxury ring that fits seamlessly into your daily life with no distractions.Battery & Charging - Wear it for up to 8 days straight. Then wirelessly recharge in just 30 minutes.Designed for daily wear - Titanium body, hypoallergenic interior- Finished with a durable PVD coating protecting it from scratches and wear. Circular Ring 2 is fully waterproof, safe for swimming, showering, and daily wear.No Subscription Required - All 13+ health core features and 140+ biometrics are free forever. Only a small number of premium features use a freemium model (free & paid partially with coins or money). All the core features are free, no subscription required.Kira™ Coaching - The Circular Ring captures over 8 key health signals and the app turns those readings into clear, easy to understand insights. You see patterns in your recovery, energy, stress, and sleep without needing to decode anything. Kira, your AI health coach, watches for any changes in your vitals, spots early warning signs, and sends you gentle, helpful recommendations. No searching. No guessing. Kira already knows what matters and what to do next.
Features
Blood Pressure Monitoring - Track your blood pressure trends. Understand how stress,sleep, and activity affect your heart health over time. Coming as a premium feature in early 2026.
Glucose Trend Monitoring - Stay ahead of your blood sugar fluctuations with non-invasive tracking. Ideal for those managing energy levels, metabolism, or early glucose sensitivity. Planned for mid 2026, as a premium feature.
ECG + AFib Detection - Track your heart rhythm with world’s first medical-grade technology and catch signs of arrhythmia before symptoms appear.
Sleep Tracking - Monitor sleep stages, breathing, and oxygen levels to understand how well your body recovers overnight.
Women’s Health - Keep track of your cycle, hormonal shifts, and fertility with personalized insights based on your vitals.
Stress & Energy Monitoring - See how stress affects your body and get guidance on when to rest or push harder.
Advanced analytics - Make graphs overlap and understand how different metrics are linked.
Energy monitoring - Get stats and in depth insights about your energy levels.
Live measurement - On-demand spot measurement for HR, SpO2, HRV, activity intensities, and Max HR.
Alarm clock - Wakes you up with a smart alarm during your lightest sleep stage with your phone's vibrations.
Guided breathing - Launch guided breathing exercises to relax, sleep better, and more.
Vital alerts - Get notified when you vitals are going off.
Medication - Never forget to take your meds anymore and keep track of your intakes.
Coherence - Dive into a state of optimal function and regulate your emotions and clarity.
Sport Sessions - Track outdoor activities with a GPS trace and reports.
Airplane Mode - Disable ring’s Bluetooth communication.
Timer - Set a timer for your workout or anything else.
Calendar - Add manual notes that are reflected in the app and add context to your data.
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