CIRCUL Schlaftracker RingCIRCUL Schlaftracker Ring

CIRCUL Sleep Tracker Ring

(1 customer review)


Fitness & Sleep Tracker Ring with Continuous Measurement for More Accurate Sleep Monitoring

Lieferzeit: 2-3 business days



CIRCUL Sleep Tracker Ring and Fitness Ring

What makes the CIRCUL ring so unique?

Unlike all other fitness and sleep trackers, CIRCUL continuously measures pulse, oxygen saturation and movement. Continuous means not even per minute, continuous means 100 times per second. Continuous measurement is particularly important in the area of sleep analysis and optimization. This is the only way to determine relevant averages and to determine a meaningful trend. Any other type of measurement is just a snapshot and therefore only partially precise.

CIRCUL Sleep Tracker Ring

Pulse and oxygen saturation are the most important parameters for sleep analysis. Why? The pulse curve alone already shows the course of sleep well and can therefore be sufficient for a healthy person.
However, if I want to know if my snoring is dangerous or wants more precise sleep phase detection, I also need oxygen saturation.

The so-called ODI (desaturation index) also plays an important role. This value is the latest scientific standard for the qualitative evaluation of sleep. It indicates the number of desaturations per hour. A desaturation is the drop in oxygen saturation. These can be caused by respiratory failures, snoring or other physiological phenomena.

Why the CIRCUL Sleep Tracker Ring and not another sleep tracker?

The main reason is the precise continuous measurement of pulse rate, oxygen saturation and movement. But the CIRCUL ring is also much more comfortable to wear than a watch or a finger clip. CIRCUL is ergonomically designed and automatically adapts to every finger in size. As a result, it is barely noticeable on the finger and can therefore also be worn well in everyday life.

More information about the ring can be found here

Try 14 days for free!

You can order the CIRCUL ring and test it for 14 days. If you are dissatisfied, we will refund you the full amount.
If you have any concerns or questions, please feel free on 0800 7879654.
We will listen to your situation and see if the ring suits you or not.

Additional information

Weight N/A

316L stainless steel

Surface treatment

PVD coating

Water protcetion



3 wave photo electric sensor, 6-axis accelerometer

Bluetooth range

<3 Meter


Bluetooth BLE 4.2

Operating life with full charge

16 hours (continuous oxygen and pulse detection), 16 hours (continuous training heart rate detection)



Charging time

less than 2 hours

Operating temperature

-10°C to 45°C

SpO2 sampling rate


SpO2 range

50% – 100%

SpO2 accuracy


HR sampling rate


HR range

30HR – 240HR

HR accuracy

+2%, +2HF, at maximum

1 review for CIRCUL Sleep Tracker Ring

  1. M Chohan

    Really enjoyed using the Circul ring, it provides clear data which is easy to interpret. I did experience an issue with it however Fynn from Circul arranged a solution and has provided excellent customer service throughout the process.

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