SLEEP TRACKERS·WITHINGS
Withings Sleep Analyzer (Under-Mattress Pad)
4 · 9,200 reviews
Editor score8.3/10
Best for: No-wearable tracking, snore + apnea signals
Lowest price we found
$199.95
At Amazon · checked 2026-07-04
Buy at Amazon · $199.95 ↗Updated 2026-07-04
Form
Under-mattress pad
Wear
Nothing on body
Tracks
Stages, HR, snoring, breathing
The wear-nothing tracker — a pad under your mattress that tracks sleep stages, snoring and apnea signs with medical-grade heritage.
For people who refuse to wear anything to bed, the Sleep Analyzer is the answer: a thin pneumatic strip slides under the mattress and tracks sleep cycles, heart rate, snoring and breathing-disturbance patterns automatically, every night, forever. Withings is a medical-device company (its analyzer is CE-marked for apnea detection in Europe), and there's no subscription. It only tracks one side of the bed and can't move with you.
Price across 3 retailers
Prices checked 2026-07-04amazon
AmazonBest price✓ Fast delivery · easy returns
Under-mattress pad
$199.95
2026-07-04
Prices shown were last checked on 2026-07-04and can change at any time — the price on the retailer's site at checkout is the one that applies. As an Amazon Associate and affiliate we may earn a commission on purchases made through these links, at no extra cost to you.
How our prices work
We show the lowest price we found at our last check (2026-07-04) and the manufacturer's list price for comparison. Retail prices — Amazon's especially — move constantly, so treat these as a guide: the price shown on the retailer's own page at checkout is the one that applies. Tap through to see each retailer's current price.
Should you buy it?
What we like
- Track sleep wearing nothing
- Best-in-class snore + breathing detection
- No subscription, no charging ever
- Medical-device brand pedigree
What to know before buying
- Tracks one side of the bed only
- Can't travel with you
- No daytime/activity data
At a glance
FormUnder-mattress pad
WearNothing on body
TracksStages, HR, snoring, breathing
ApneaCE-marked detection (EU)
SubscriptionNone
SetupOne-time under mattress
CoverageOne sleeper/side
AppHealth Mate
Best forZero-wearable tracking
How it scores
How our 8.3/10 breaks down — rated on the dimensions that matter most for sleep trackers, from published specifications and third-party test data, not the marketing.
Accuracy
8/10
Battery life
10/10
App & insights
7/10
Comfort
10/10
Value
8/10
Compare with alternatives
Quick verdicts for the sleep trackers most often considered alongside the Withings Sleep Analyzer (Under-Mattress Pad).
VS·HEAD-TO-HEAD
Withings Sleep Analyzer (Under-Mattress Pad) vs Oura Ring 4
The most comfortable passive sleep tracker on the market — if you can stomach the $5.99/mo subscription.
→ Passive trackers, women's health tracking, athletes wanting recovery data
VS·HEAD-TO-HEAD
Withings Sleep Analyzer (Under-Mattress Pad) vs RingConn Gen 2 Smart Ring
The no-subscription Oura rival — sleep-apnea alerts, 12-day battery and a charging case, with zero monthly fee.
→ Oura features without the monthly fee, long battery
VS·HEAD-TO-HEAD
Withings Sleep Analyzer (Under-Mattress Pad) vs Apple Watch Series 10
Discontinued — superseded by Series 11. Still the strongest sleep-tracking smartwatch for iPhone users if you find remaining stock, but buy the Series 11 instead unless the discount is steep.
→ Existing owners, discounted-stock buyers comparing against Series 11
Decision support · what no other comparison site has
Take the quiz · 60 secNot sure which one is right for you?
Our 60-second sleep score quiz asks 8 questions and recommends the right sleep gear for your goals. Built by sleep engineers. Free, no signup.
Editor's deep dive
Is the Withings Sleep Analyzer worth it?
The short answer
The Withings Sleep Analyzer is worth $199.95 if you want sleep and breathing data without wearing anything. A pad slides under the mattress and tracks stages, heart rate, snoring and breathing disturbances with no charging and no subscription. It covers one side of the bed only, and its apnea feature is a screening signal rather than a diagnosis.
Who it's for
People who will not wear a ring or a watch to bed — which is a larger group than the wearables market admits — and people who specifically want snoring and breathing data rather than step counts. It suits a fixed bed and a consistent sleeping side. It suits couples badly unless you buy two. And it suits anyone who resents subscriptions: Withings charges nothing to see your own data, which is unusual in a category where Oura is $5.99/month and Whoop is roughly $30.
Best for you if…
Refuses to wear a tracker to bed Great fit
This is the product's entire reason to exist, and nothing else in the category does it as well at this price.
Suspects snoring or disturbed breathing Great fit
Snore and breathing-disturbance detection is the strongest part of the feature set — better than wrist wearables — provided you treat the output as a screening signal.
Shares a bed Decent fit
It reads only the side it sits under. Workable if one partner wants the data; otherwise it is a $400 decision, not a $200 one.
Travels frequently Skip it
It lives under a specific mattress. A ring or a watch is the right form factor if your bed changes.
Wants daytime activity and training data Skip it
No daytime tracking at all. This is a bed sensor, not a wearable — pair it with a watch or pick Oura or Whoop instead.
Avoiding subscription costs Great fit
Every metric is free in Health Mate. Over three years that is roughly $215 saved against Oura and far more against Whoop.
Bottom line
The best answer to "I want the data but I refuse to wear anything." The trade is mobility and coverage: it stays with the bed, so it does not travel, and it reads one side of the mattress, so a shared bed needs two units. Treat the apnea capability precisely — it is CE-marked for apnea detection in Europe and is NOT FDA-cleared in the United States, so in the US it is best understood as a well-built screening signal that might prompt a conversation with a doctor. If it flags disturbed breathing consistently, that is a reason to seek a proper sleep study, not a reason to self-diagnose.
How we scored this
Synthesis review. Sources: Withings' published technical specifications and regulatory status, the company's CE marking documentation for apnea detection, independent comparisons of under-mattress ballistocardiography against polysomnography, and aggregated public owner consensus across 9,200+ ratings. Scored on the sleep-tracker criteria used across this category — accuracy, battery, app and insights, comfort, value — with comfort scoring maximum because wearing nothing is the product's defining property. We have NOT slept with this device: SleepyHero runs no first-hand product testing and makes no such claim, and we have not independently validated its staging or apnea accuracy. Reviewer signoff by Dr. Logan Foley, CSSC pending.
Sources
- [1] Edouard, P., et al. (2021). Validation of the Withings Sleep Analyzer, an under-the-mattress device for the detection of moderate-severe sleep apnea syndrome. Journal of Clinical Sleep Medicine, 17(6), 1217-1227. The manufacturer-independent validation behind the apnea-screening claim.
- [2] Kapur, V.K., et al. (2017). Clinical Practice Guideline for Diagnostic Testing for Adult Obstructive Sleep Apnea. Journal of Clinical Sleep Medicine, 13(3), 479-504. American Academy of Sleep Medicine guidance — why a consumer screening signal is not a diagnosis.
Frequently asked questions
How can a pad track sleep?
Pneumatic sensors read micro-movements, heartbeat and breathing through the mattress — no contact needed. Accuracy rivals wrist wearables for staging and beats them for snore/breathing detection.
Does it detect sleep apnea?
It flags breathing-disturbance patterns and is CE-marked for apnea detection in Europe (not FDA-cleared in the US). A strong screening signal, not a diagnosis.
Two people in the bed?
It tracks the side it's under — buy two for a couple, or place under the sleeper who wants data.
Subscription?
None — all metrics free in the Health Mate app, unusual and welcome.
Affiliate disclosure: SleepyHero earns a small commission when you buy through these links. It doesn't cost you extra. Reviews and rankings are editorial — we don't accept payment for placement.