Improve your energy levels and immune system like never before thanks to sophisticated tracking, easy-to-read insights and pertinent recommendations.
Energy is high today. Good day for a run, if you want one.
Movement intensity · 06:00 to 23:00
11,480steps
Active minutes
68
Calories
2,410
Cardio points
42
VO₂ max
48
Nothing was started by hand. The run at 18:10 was recognised on its own, priced against the morning's energy score, and folded into the day's load.
Your energy levels aren't just about how you feel; it's about what's happening inside your body and mind as it adapts to daily stressors before you feel it. Circular gives you quantified metrics, so you make informed decisions each day.
Three daily targets, set from your own history rather than a round number someone picked.
The Energy score is the ultimate score that tells you how much energy you have accumulated for the day. It is made up of many night and day markers so that you can evaluate your vitality and know every morning if you can surpass yourself or if you may avoid intensive activities and focus on rest.
Circular calculates your energy levels based on many physiological contributors: Physical Activity, Sleep, Heart Rate Variability (HRV), Resting Heart Rate (RHR), temperature variation, Blood Oxygen Saturation and Breathing Rate. These metrics are calibrated to your baseline, which means that your score is personal to you.
Getting the most out of training doesn't always require working harder: it requires working smarter. Quantify your physical activities and optimize your effort with heart rate training range.
Zones are set from your own maximum and resting heart rate, so the same run lands differently for two people — as it should.
Very light. Warm-up, cool-down, and the walking that fills most days.
Conversational. Builds the aerobic base most people are short of.
Steady effort. Where most runs and rides actually sit.
Threshold. Hard, sustainable for a while, expensive to recover from.
Maximum. Short intervals only — and the ring will price it tomorrow.
Heart Rate Variability (HRV), Resting Heart Rate (RHR), Blood Oxygen Saturation and Breathing Rate get a lot of attention nowadays. It has uses for athletes to optimize their training, for professionals and individuals wanting to check on overall wellness and is studied globally for its correlation to our autonomic nervous system and stress. The HRV analysis is a powerful and reliable metric that is made easy to track with Circular.
By wearing Circular 24/7, you'll get feedback on every moment of the day. Kira will reveal how your body is responding to things like physical activity, rest, stress, travel, and work, so you can find the right balance and make smarter decisions when it comes to recovery or training.
Deep sleep, HRV and resting heart rate decide how much load today can absorb — which is why the energy score arrives with the morning, before you have done anything.
A hard session moves your wind-down earlier and raises the sleep you need. The ring says so in the evening rather than in hindsight.
Make the most of your day by improving your energy
Track your energy levels each day and trends over time.
Understand your body and learn about the parameters that positively or negatively impact your energy levels and how it correlates with your sleep & activities.
Build better habits for better performance.
Walking, running, cycling and swimming are recognised without pressing anything. Anything else can be logged by hand, and the ring still counts the heart-rate cost.
Yes, though a barbell against titanium is hard on any ring. Many people move it to the other hand or take it off for heavy sets — the day's data closes the gap from heart rate either side.
It is recovery expressed as something usable: what you have available today, drawn from last night's sleep, your HRV, resting heart rate, temperature and the load you have been carrying.
Yes. Swims are detected, and the ring is made to be worn in water — showers, baths and swimming included.
It is an estimate from heart-rate response to known effort, useful as a trend rather than a lab number. Watch the direction over months, not the digit.
No. Activity, zones, VO₂ max, the energy score and Kira's recommendations are included with the ring, permanently.
Next
Wear it tomorrow and read what the day actually cost you.
Wear it tomorrow and read what the day actually cost you.
%201-1.avif)