Health tracking · Circular Ring 2
The Circular Ring 2 tracks more than 140 biomarkers across 14+ health features, refreshing throughout the day and night. It records an ECG from your finger, estimates your blood pressure trend, and follows your sleep, heart, stress, recovery, and cycle, and more.
Then Kira, your personal AI health coach, reads them together and tells you the one thing to do today. There is no subscription.
What does the Circular Ring 2 track?
Circular Ring 2 gives each health goal its own tracker, then connects them into one full picture of your body. Use it as a sleep tracker, heart rate monitor, ECG tracker, blood pressure tracker, ovulation tracker, HRV tracker, stress tracker, activity tracker, and more. Kira AI reads the signals together and gives you one clear recommendation a day. No subscription required for core features.
Track your estimated VO2 Max over time to understand aerobic fitness and how your training is changing your body.
Use Coherence to follow heart rhythm balance and guided breathing, helping you bring your body into a calmer state.
Find your personal caffeine cutoff based on sleep, HRV, and how your body handles rest.
Track how much sleep recovery your body may still need, based on your recent nights and recovery patterns.
A watch is a computer strapped to the most restless part of your body. A ring sits still, close to the blood, and you can comfortably sleep in it.
The wrist moves, slips, and bumps. The finger holds steady against the artery, so the heart and sleep readings come through with less noise. A 3-4 gram ring is easy to forget, and that matters most at night, when the readings matter most.
See how your nights are really built: light sleep, deep sleep, REM, wake patterns, sleep debt, and how refreshed you feel in the morning. Circular Ring 2 is built to be worn comfortably all night.
Sleep Stages · Smart Alarm · Circadian Alignment · Caffeine Window · Sleep Debt · Wake Up Score
Track the daily signals that matter more with age: heart rhythm, blood pressure trends, blood oxygen, breathing, sleep, activity, and vital changes. Circular Ring 2 helps you stay aware of your body without wearing a bulky watch.
ECG and AFib Detection · Blood Oxygen · Breathing Rate · Vital Alerts · Steps and Calories · Sleep Stages · Blood Pressure
Use Circular Ring 2 to keep a closer eye on ECG readings, AFib detection, blood pressure trends, HRV, blood oxygen, breathing rate, and high or low vital alerts. Built for daily awareness, not medical diagnosis.
ECG and AFib Detection · Heart Rate Variability · Blood Oxygen · Breathing Rate · Vital Alerts · Live Measurement · Blood Pressure
Know when your body is ready and when it needs a lighter day. Circular Ring 2 reads HRV, sleep, stress, activity, and energy together so recovery is easier to understand.
Heart Rate Variability · Stress and Energy · Sleep Debt · Wake Up Score · Activity Intensity · Coherence
Train with clearer feedback from sport sessions, activity intensity, VO2 Max, heart rate patterns, and recovery. Circular Ring 2 helps you understand both the workout and what your body can handle after it.
Sport Sessions · Activity Intensity · VO2 Max · Heart Rate Variability · Stress and Energy · Steps and Calories
Track the daily habits that shape weight over time: movement, calorie burn, sleep, caffeine timing, stress, and recovery. Circular Ring 2 helps you see what supports your routine and what throws it off.
Steps and Calories · Activity Intensity · Sleep Stages · Caffeine Window · Stress and Energy · Wake Up Score
See how stress shows up in your HRV, breathing, heart rate, sleep, and energy. Circular Ring 2 helps you notice pressure earlier and use breathing tools to steady your body.
Stress and Energy · Coherence · Guided Breathing · Heart Rate Variability · Breathing Rate · Live Measurement
Track cycle changes through body temperature, HRV, sleep, recovery, and energy. Circular Ring 2 helps you understand how your cycle may affect how you sleep, feel, and recover.
Women’s Health · Body Temperature · Sleep Stages · Heart Rate Variability · Stress and Energy · Kira
Use body signals instead of calendar guesses. Circular Ring 2 tracks temperature, HRV, sleep, and cycle patterns to help estimate your fertile window over time.
Women’s Health · Body Temperature · Heart Rate Variability · Sleep Stages · Kira
Get one simple view of your body each morning. Circular Ring 2 connects sleep, heart rate, stress, recovery, activity, and cycle data, then Kira gives you one clear recommendation.
Kira · Live Measurement · Stress and Energy · Sleep Stages · Steps and Calories · Wake Up Score
Kira AI
Kira is the coach inside the ring. It reads all 140+ biomarkers together, learns your body across a fourteen day calibration, and each morning gives you one clear thing to do: rest, push, move your bedtime, or notice stress patterns earlier. Most trackers hand you a screen of numbers and leave. Kira reads the numbers for you, tells you what they mean and how you can act on them. And yes, it comes free with the ring.
Three steps, and the proof behind them.
Four sensors, an ECG, a three colour PPG, skin temperature, and a motion sensor, read more than 140 biomarkers from your finger every two minutes, day and night.
Over fourteen days it builds your personal baseline, your chronotype, your resting HRV, your sleep and stress patterns, so it scores you against you, not a population average.
Simple, easy-to-understand language (available in all languages), one recommendation towards your wellness, and the reason behind it.
The ring is titanium, weighs two to three grams, and is rated IP68 for water.
The battery runs up to eight days and charges in thirty minutes.
You size it by pointing your phone camera at your hand.
It syncs with Apple Health and Google Fit.
Your data is encrypted and handled under GDPR and HIPAA standards.
From $299, with no subscription on any core feature.
The ring is a monitoring tool, not a replacement for a doctor's diagnosis.
Circular Ring 2 is a wellness device. It does not diagnose, treat, cure or prevent any disease.
No. Circular Ring 2 includes its 14+ core health features with no monthly fee. ECG, AFib detection, sleep tracking, heart rate, recovery, cycle tracking, and Kira AI are included with the ring.
Circular Ring 2 needs time to learn your body. During the first 14 days, it builds your personal baseline for sleep, heart rate, HRV, stress, recovery, and daily patterns. After calibration, Circular Ring 2 can compare your data to your normal range instead of a general average.
Circular Ring 2 reads from the finger, where blood flow is strong and the sensor can stay in close contact with the skin, especially during sleep. This helps Circular Ring 2 capture clean heart and sleep signals overnight. Like any wearable, accuracy can depend on fit, movement, skin contact, and how consistently you wear it.
Yes, as a trend. You calibrate once with three readings from a validated cuff, and after that Circular Ring 2 estimates your systolic and diastolic from the shape of your pulse wave at the finger. You see a 30-day trend, your pulse pressure, and how many days landed in your target range. It is a monitoring tool for direction over time, not a replacement for a cuff, and it does not diagnose hypertension.
Circular Ring 2 battery lasts up to 8 days in Eco mode and up to 5 days in Performance mode. A full charge takes about 30 minutes.
Yes. Circular Ring 2 is rated IP68, so you can wear it during showers, workouts, and swimming.
No. Kira AI comes free with Circular Ring 2. It reads your health data and gives you one clear recommendation each day. A future conversational version, Kira+, may be offered as a separate upgrade, but the current Kira AI features are included.
Yes. Circular Ring 2 can receive new features through software updates. Core feature updates are included without a monthly subscription.
You can size Circular Ring 2 using your phone camera. Point the camera at your hand with a credit card in frame, and the app gives you your closest ring sizes in seconds.
Buy it once. Track more than 140 biomarkers across 14+ features in real time. Let Kira turn them into one clear move a day. No subscription, no paywalls, nothing to decode. From $299.
USD$299
Take a reading whenever you want one. No subscription, no limit.
%201-1.avif)