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Deepest sleep of the night
92 minutes of deep sleep logged before 4am — the window where most physical repair happens.
Heart rhythm with on-demand ECG, blood-pressure trends, four-stage sleep, recovery, stress and activity — read continuously and explained in plain language. No mandatory subscription.
Circular Ring 2 · Features
Heart rhythm with on-demand ECG, blood-pressure trends, four-stage sleep, recovery, stress and activity — read continuously and explained in plain language. No mandatory subscription — most of it is included with the ring, and a few Pro features are optional.
Everything on this page
Heart rate, HRV, breathing rate, blood oxygen, skin temperature, motion and ECG — read continuously.
What those seven become once the app has done the work on them.
Each one a whole feature area you can pin or hide, not a single chart.
Matched to what your data shows, not to a generic wellness script.
92 minutes of deep sleep logged before 4am — the window where most physical repair happens.
Twenty-two minutes before the alarm you set, the ring catches a light phase and wakes you there instead.
Overnight HRV and resting heart rate settle into one energy score before you are properly awake.
Fourteen days of morning readings in the same band. The trend is the point, not any single number.
Breathing rate up, HRV down. The app suggests a two-minute reset rather than a fourth coffee.
Distance, calories and active minutes accumulate through the day without anything being started.
Twenty minutes on the sofa is detected and staged like any other sleep, then added back to the day.
No button pressed. 8.4km logged with heart-rate zones and a recovery cost attached.
Given the run and the afternoon, tonight's target moves 25 minutes earlier.
Hold the ring, stay still, and it records a single-lead ECG. It looks for atrial fibrillation, the most common serious arrhythmia, and tells you what it found in a sentence — not a chart you have to decode.
A regular rhythm, evenly spaced, with nothing unusual in the trace.
A clinician-ready report, exported from the reading you just took.
Rhythm is watched continuously, day and night, without a measurement.
Woke you 22 minutes early, in a light stage inside your window.
A shorter night than usual, but a well-shaped one. Deep sleep landed above your baseline.
Sleep is not one thing, so the ring does not score it as one. It separates awake, light, deep and REM, tracks heart rate, blood oxygen and breathing rate while you are under, and turns the shape of the night into one honest number in the morning.
A good HRV for you is not a good HRV for anyone else. The ring builds your baseline over weeks, then reads each morning as a distance from it — which is what makes an early illness or a hard week visible days before it feels obvious.
Readiness is high today. Good day for a run, if you want one.
Built from your own last 14 nights, not a population average.
Every reading has sat inside the same band. The direction is the point.
A trend from the optical and ECG signal, not a clinical measurement.
The ring reads the pulse wave and the ECG signal at the same time, and a measurement takes less than a minute. You calibrate it against a cuff once a month, and it is built to show you a direction rather than to replace one.
A run, found on its own. No start button, no forgetting.
Weighed against the readiness you actually had this morning.
Zone 1
6 min
Zone 2
11 min
Zone 3
18 min
Zone 4
6 min
Activity intensity, steps, calories, active minutes, training zones and cardio points are all detected on their own. You can also start a session for precise tracking of a specific sport, then see it priced against the recovery you actually had.
Down from 3.6 to 2.1. The ring buzzes on each switch, so you can keep your eyes closed.
Continuous through the day, so a demanding morning is a curve you can act on. The app offers two minutes of paced breathing instead of a fourth coffee.
Temperature is 0.3°C above your follicular average — which is what the prediction reads.
Nightly skin temperature is what actually shifts across a cycle, so that is what the prediction is built on — phase, likely dates, and how each phase moves your sleep and energy.
Wear it to bed tonight and read the morning. Everything measured, nothing gated.