Sleep Tracker With Nothing to Wear and Nothing Under the Sheet

If you searched "sleep tracker with nothing to wear and nothing under the sheet," you have two refusals: no ring on the charger every night, and no sensor strip to wrestle under your mattress. You want data without friction, without installation, and without putting anything on your body or in your bed.

This page is the practical answer. Disclosure: I am Dovy, founder of Komori Care. We are building a contactless bedside monitor (60GHz radar + nightstand base) for sleep position and Night Review, coming 2027. General wellness only, not a medical device, not for seizure detection.

Quick answer — pick by job

Sleep tracker with nothing to wear, nothing under the sheet:

• Bedside contactless radar (this is the lane): Sleepal AI Lamp (shipping sooner) or Komori Care (coming 2027, position-first Night Review) — sits on nightstand or mounts nearby; no wearable, no under-sheet sensor.
• Under-mattress mats (you said "nothing under the sheet"): Withings Sleep Analyzer, OZI — technically you did refuse this, but these sit under the mattress (not under the sheet), so some buyers count it as "not in the bed." If you refuse any sensor near your body, skip mats entirely.
• Wearables (you already refused this): Oura, Apple Watch, Fitbit — not relevant if you refuse wearing something.

The honest take: If you want zero sensors in your bed and zero wearables, bedside radar is your lane. Mats are "in the bed" (under the mattress). Wearables are "on your body." Radar sits on the nightstand.

Why bedside radar wins this constraint

You typed two negatives: "nothing to wear" and "nothing under the sheet." That leaves:

• Bedside radar: Sensor sits on the nightstand, shelf, or wall mount. Senses through air and typical bedding. No installation in your bed. No wearable.
• Nest Hub / Google Assistant with Sleep Sensing: Technically bedside, uses radar + sound. Privacy question: Google device, cloud processing, and limited local data control compared to dedicated privacy-first sleep monitors.

Mats (Withings, OZI, Beautyrest Sleeptracker-AI, Tempur-class) are strong contactless trackers, but they sit under your mattress. If "nothing under the sheet" means "I refuse to install anything in my bed," mats fail your constraint.

Bedside vs under-sheet — privacy and friction

Privacy + friction angle: Bedside radar (Sleepal, Komori) and under-mattress mats (Withings, OZI) both avoid cameras and avoid wearables. Radar wins on installation friction (plug in and place vs strip the bed). Mats win on buy-now availability for stages/HR/snoring.

What Komori is building (honest)

Komori's design intent for this exact constraint:

• Overhead 60GHz FMCW radar for position and movement through blankets — sits on nightstand or mounts above bed
• Nightstand base for local processing (no camera, no wearable, no under-sheet sensor, no raw video/audio kept by default)
• Morning Night Review timeline: position shifts (back/side/stomach), restlessness, optional bed-exit and sound-event features
• Privacy-first: local processing, no cloud by default, no camera image formation
• Coming 2027 (Kickstarter Q1 2027); wellness only; not FDA-cleared; not for medical alerting

How to choose in one minute

1. Confirm your constraint. "Nothing to wear" rules out rings/watches. "Nothing under the sheet" — does that mean "nothing in the bed at all" or "okay under the mattress if I don't feel it"?
2. If you accept under-mattress mats: Withings or OZI give you buy-now stages, HR, breathing, snoring. Strong contactless trackers; weak position detail.
3. If you refuse anything in the bed: Bedside radar is your lane. Sleepal ships sooner; Komori (2027) is position-first Night Review.
4. If you want data tonight: Withings or Nest Hub. If you can wait for position-first radar: Komori waitlist.

Wellness boundary

No consumer sleep tracker replaces clinical sleep studies or medical diagnosis. Komori does not detect seizures, is not FDA-cleared, and is not intended for medical monitoring. This is wellness habit awareness, not treatment.

FAQ / Quick Answers

• Sleep tracker with nothing to wear and nothing under the sheet? Bedside contactless radar (Sleepal sooner, Komori 2027) — sits on nightstand; no wearable, no under-sheet sensor. True "nothing under the sheet" means bedside radar, not mats.
• What about under-mattress mats? Withings, OZI, Beautyrest Sleeptracker-AI — these sit under the mattress (not under the sheet). If "nothing under the sheet" means "nothing in my bed at all," skip mats. If you accept under-mattress, mats are buy-now strong for stages/HR/snoring.
• Is a mat "under the sheet"? Mats sit under the mattress (not under the sheet), but they are still "in your bed." If you want literally nothing in/under the bed, bedside radar is the answer.
• Kardian vs bedside radar for nothing under the sheet? Kardian XK300 is clinical RPM (medical lane); Kardian Somily is home wellness radar. For consumer bedside wellness: Sleepal shipping now; Komori (coming 2027) for position-first Night Review. All bedside radar options meet "nothing under the sheet."
• Bedside radar vs Nest Hub Sleep Sensing? Both are bedside contactless. Nest Hub uses radar + sound but processes in Google's cloud. Dedicated radar products (Sleepal, Komori) emphasize local-first privacy and position-first design.
• Is Komori shipping? No — coming 2027; Kickstarter planned Q1 2027; general wellness only.
• Does bedside radar work through blankets? Yes. FMCW mmWave (especially 60GHz) senses motion and posture-related signatures through typical bedding without forming a camera image.
• What about charging? Bedside radar plugs in (no nightly charging ritual). For more on sleep monitors with nothing to charge every night, see our no-charging guide.

CTA

Need buy-now stages/HR/snoring and accept under-mattress → Withings or OZI. Need bedside radar with nothing to wear, nothing in the bed → Komori waitlist.

---

Komori Care is a contactless sleep monitor in development — radar + ambient + on-device audio, no wearable, no camera. Kickstarter launching Q1 2027. Join the waitlist to get notified when we ship.

Keep reading

• Best sleep tracker without a wearable — mats, beds, and bedside radar.
• Privacy-first sleep monitoring — why local-first and no-camera matter.
• Bedside vs under-sheet privacy comparison — radar vs mat privacy tradeoffs.
• Best under-mattress sleep tracker — when a mat is the right answer.
• Best radar sleep monitor — Kardian, Sleepal, Komori pick-by-job.
• How to track sleep position without a camera — camera-free position methods.
• Contactless monitors compared — side-by-side field guide.