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Features/Sleep

Wilt u een betere Gezondheid? Hou je bezig met je slaap

Verbeter je slaap als nooit tevoren dankzij geavanceerde tracking, eenvoudig af te lezen inzichten en een naadloze slimme ring.

Buy now See a night
SleepRing 78%
Last night · 23:05 → 06:38 79sleep score
7h 33m
Last night's story

A shorter night than usual, but a well-shaped one. Deep sleep landed above your baseline.

Deep sleep +12%1 disturbance
One night, minute by minute

Sleep is not one thing, so it is not scored as one.

Sleep score

79of 100

Asleep

7h 33m

Deep

1h 32m

REM

1h 50m

Awake

18m

23:19 asleep
03:12 deepest
04:40 woke briefly
06:38 smart alarm
23:0501:0003:0005:0006:38
AwakeLightDeepREM

Deep sleep clusters early, REM later. That shape matters more than the total — which is why the score reads the shape, not just the hours.

How it measures

Een slaaplaboratorium in een kleine en comfortabele ring

Precise PPG heart rate, respiratory rate, SpO2 and motion sensors along with a machine learning powered app will help you understand and improve your sleep over the long term.

Kira slaapt nooit, maar jij zult beter slapen

Kira learns about your baselines to give you a daily personalized sleep quality and tells you exactly what parameters impact your sleep to improve them. Circular measures not only how long you sleep, but the time spent in each stage, your circadian rhythm, your heart rate metrics and respiratory rate.

  • Heart rateBeat to beat through the night, plus the lowest point and when it arrived.
  • HRVOvernight variability, the clearest signal of how recovery actually went.
  • Respiratory rateBreaths per minute, and any deviation from your own nightly average.
  • Blood oxygenSpO₂ sampled through the night. Patterns worth discussing with a clinician, not a diagnosis.
  • Skin temperatureDistance from your baseline — an early marker of illness and cycle phase.
  • MotionMovement and stillness, which separates awake from light sleep.
The science, in three parts

Maak kennis met de 3 pijlers van slaap

Kwaliteit

Leer hoeveel tijd je in elke slaapfase doorbrengt: Licht, Diep, REM & Wakker. De diepe slaap zorgt voor lichamelijk herstel, terwijl de REM-slaap helpt bij het geheugen, het denken en de creativiteit. Weet u hoeveel tijd u in elke fase doorbrengt? Is het optimaal? Kira zal u helpen deze te verbeteren en te optimaliseren.

Duur

Circular bekijkt hoeveel u daadwerkelijk hebt geslapen in vergelijking met uw persoonlijke behoefte aan slaapduur. Circular berekent ook de duur van de verstoringen tijdens je slaap, en geeft je een score over hoe efficiënt je hebt geslapen.

Circadiaan ritme

De wetenschap toont aan dat slaap een licht/donkercyclus moet volgen, in overeenstemming moet zijn met uw natuurlijke chronotype en dat hoe consequenter u bent met uw slaapschema, hoe beter u zult slapen. Kira doet aanbevelingen die overeenkomen met uw chronotype om een hogere consistentie te bereiken.

Timing

Ontdek uw Chronotype, een levensveranderend instrument

Chronotypes zijn gekoppeld aan je interne klok en aan je genen. Ze hebben een direct effect op de timing van uw dagelijkse activiteiten en uw prestaties daarbij. Ontdek uw Chronotype en de optimale tijden voor uw activiteiten.

Your day, as your chronotype orders it

00:0006:0012:0018:0024:00
Asleep

Your window, based on your own last two weeks.

Wake and rise

Light exposure here sets the whole day's rhythm.

Productivity zone

The hours your chronotype does its best thinking.

Caffeine window

Closes early enough to clear before your bedtime.

Movement

When training costs you least and returns most.

Wind-down

The ring nudges you here, adjusted for the day you had.

Waking up

Een goed ontwaken voor een goed begin van de dag

Waking up in a light sleep stage helps to limit sleep inertia. If you are tired of waking up in a bad mood but would rather wake up with energy then Circular will help you.

Smart, noninvasive and silent at the same time. Circular can study your sleep and smoothly wake you up during the light sleep stage, without disturbing your surroundings thanks to silent vibrations.

Smart alarm · a window, not a time

06:38 woke you here
07:00 set
06:0006:3007:00
  • You setA time, and how wide the window before it can be.
  • The ring picksThe first light stage inside that window.
  • You feelSilent vibration on the finger. Nobody else wakes up.
  • You seeA wake-up score, and the minutes you gained.
How to read it

Nine numbers behind one score.

Each one is measured against your own baseline, learned over your first two weeks of wear. Tap any of them in the app for what it is, why it matters and what moves it.

  • Deep sleepPhysical repair. Clusters in the first half of the night.
  • REM sleepMemory, learning and mood. Longer stretches towards morning.
  • Real sleepTime actually asleep against time in bed.
  • DisturbancesHow often the night broke, and for how long.
  • TranquilityHow still you were — restlessness costs recovery.
  • Time to fall asleepMinutes from lights out to the first stable stage.
  • Circadian rhythmHow closely last night matched your own schedule.
  • Sleep debtAccumulated shortfall against your personal need.
  • Heart rate in sleepAverage, lowest point, and when it arrived.
  • BaselineEvery number above is read as a distance from yours.
Questions the ring answers

Hoeveel weet je eigenlijk over je slaap?

Hoeveel slaap moet je krijgen?
Uw duur van de echte slaap?
De duur van je slaapcyclus?
Uw aantal slaapcycli?
Wat is uw optimale slaapschema?
Je REM-slaapduur?
Hoe kan je de tijd om in slaap te vallen verkorten?
Do you have sleep inertia or disturbed breathing at night?
Wat is het effect van je huidige slaap op je energie?
The routine

Biohack je weg naar een betere slaap

Make the most of your day by improving your sleep journey

1

Track your sleep each night and trends over time.

2

Understand your sleep and learn about the parameters that positively or negatively impact your sleep quality and how it correlates with your days.

3

Build better habits for better rest.

4

Wake up with energy with a silent & smart alarm clock.

Wat je mist met een inefficiënte slaap

01

Immuunsysteem tegen infecties en hart- en vaatziekten

02

Productiviteit, cognitief vermogen en focus

03

Stress, stemming en gewichtsbeheersing

Questions

Before you wear it to bed.

More in the help centre.

Roughly two weeks. The ring spends that time learning your baselines — resting heart rate, HRV, temperature, how long you actually need — because a score against a population average tells you very little.

That is the reason the ring exists. Nothing on the wrist, nothing strapped to your chest, and the finger gives a cleaner optical signal than a watch pressed into a pillow.

The ring tracks blood oxygen and breathing rate through the night and can show patterns worth discussing with a clinician. It is not a diagnostic device.

No. The vibration comes from the ring itself, so the phone can stay in another room — which is usually better for the night anyway.

Yes, if you switch nap tracking on. Naps are scored separately and folded into your sleep debt rather than into last night's score.

No. Staging, the nine metrics, chronotype, the smart alarm and Kira's recommendations are included with the ring, permanently.

Volgende

Uw lichaamsbeweging heeft ook een grote invloed op uw energie

Learn how
Woman checking the Circular app while wearing the ring
Leer jezelf kennen. De cirkel is rond.

Start with one night.

Wear it to bed tonight and read the morning.

Buy now Get a sizing kit
Woman checking the Circular app while wearing the ring
Leer jezelf kennen. De cirkel is rond.

Start with one night.

Wear it to bed tonight and read the morning.

Buy nowGet a sizing kit