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Kardian · Guides · Sleep tracking without a wearable
Sleep tracking, nothing worn

A sleep tracker you do not wear. Nothing on the wrist, the finger or the mattress.

Kardian Somily is a small disc on the wall by your bed. It reads your resting heart rate and breathing from the movement of your chest, through the duvet, all night. Each morning: last night, beside your usual. No band to tighten, no battery to watch, nothing to forget on the nightstand.

TIME Best Inventions 2026, Health & Wellness.

A woman reading in a chair by the bedroom window
Why people stop tracking

The best tracker is the one still running in month six.

Wearables are good at a lot. But a record only builds while the device is on, charged and comfortable, every single night.

The charging gap

Charge it overnight and you lose the night. Charge it in the day and you have to remember.

Comfort

A band on the wrist or a ring on the finger is one more thing in bed. Some people simply sleep better without.

The drawer

Travel, a busy week, a flat battery. Then the streak breaks, and the habit with it.

Two in the bed

A pad under the mattress feels both of you. A sensor above your side reads the person closest to it.

What it reads Trends, not a diagnosis

Measured at the chest. Not estimated at the wrist.

Resting heart rate

Read from the chest through the night, thousands of times, while you are still.

Breathing and its rhythm

Breaths per minute, and the spacing between them: two nights can average the same and feel nothing alike.

How settled the night was

How long you slept, when you were in bed, and how restless the whole body was.

Beside your own nights

Last night next to your last seven and fourteen, so a drift stands out against your usual.

With Max, Heartbeat Clarity follows how cleanly and regularly each beat comes through, night after night. It is investigational, and breathing rhythm is a wellness trend; neither is an FDA-cleared measurement.

The XKare app showing last night beside recent nights
The XKare app. Free, on iPhone and Android.
A smart ring and a smartwatch
Already wear a ring or a watch?

Keep it. Read both in the morning.

A ring or a watch is good at daytime activity, heart-rate variability, skin temperature and sleep stages. Somily does not do those. It measures breathing and resting heart rate from the chest, through bedding, with nothing worn, and compares each night with your own. Many people use one for the day and Somily for the night.

Where it goes

Two strips of tape. One cable. Then go to sleep.

Above the headboard

About 1.5 metres from the floor, on your side of the bed. Sleeping alone: the centre.

Near the bed corner

Closer to the body, just above the mattress, keeps the cable out of sight.

Behind the bed frame

Out of sight between the wall and the headboard, as long as the headboard is not a solid metal plate.

Kardian Somily is a general wellness product. It is not a medical device, does not diagnose, and is not an alarm. Not the XK300 Essence and not equivalent to it.

Questions

Before you take it off your wrist.

Does it track sleep stages?

No. Rings and watches estimate sleep stages; Somily does not. It reads resting heart rate, breathing, time in bed and how restless the night was, and compares each night with your own recent nights.

Does it work through blankets?

Yes. The radar passes through a duvet, a topper and clothing, in any sleeping position.

We are two in the bed. How does it know who it is reading?

It collects from the closest body. Mount it above your side of the bed and it reads you. Two people, one sensor each, above each side, each paired to its own person in the app. If it picks up two sets of vital signs it pauses.

Is there a camera or a microphone?

No. There is no lens and no microphone. Radar reads movement. It cannot see a face or hear a word.

Does it need charging?

No. It runs on USB power from the wall, so it is always on and never flat.

Is there a monthly fee?

Not for two years. $299 includes two years of Max membership. After that, keep Max at $6 a month, or move to the free plan and keep the basics. Nothing changes unless you choose it.

Does it need Wi-Fi?

Yes. Your nights go to the free XKare app over your home Wi-Fi. Bluetooth is used only once, during set-up.

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