I need a sleep tracker that slides under the mattress.

If you specifically want a sleep tracker that slides under the mattress, the Withings Sleep is the one I’d recommend.

• Withings Sleep Analyzer - $175.06 (IoThings.store)

Why I’d pick it

• Completely non-wearable — the sensor sits between your mattress and bed base.
• Tracks sleep duration, sleep stages (including REM), heart rate, breathing, movement, and snoring.
• No charging; it stays plugged in and automatically syncs over Wi-Fi.
• Only 5 mm (0.2") thick, so you shouldn't notice it under the mattress.
• Works with spring, foam, latex, and memory-foam mattresses; Withings says it has been tested with mattresses 4–15 inches thick.
• The basic sleep history and trends don't require a subscription.

Current price from Withings: about $159.95.

If you tell me your budget and whether you want sleep-apnea detection, heart-rate tracking, or just sleep stages/duration, I can narrow it down to the best 2–3 options.

If you hate wearing a smartwatch or a ring to bed, an under-mattress sleep tracker is the way to go—completely out of sight with nothing to charge or strap to your body.

The top contactless, under-mattress sleep monitoring options available include:

Add to list

• How it works: A thin, discreet pad that slips right under your mattress (compatible with thicknesses between 4 to 15 inches) and plugs into a USB power source.
• Key features: Tracks sleep cycles (deep, light, REM), continuous heart rate, snoring, and detects breathing disturbances/signs of mild sleep apnea.
• Bonus: Syncs via Wi-Fi and features smart home automations (IFTTT and Alexa) so it can dim your lights or adjust your thermostat automatically when you get in or out of bed.

Add to list

• How it works: High-accuracy sensor strips that slide beneath the mattress, working with virtually all mattress types and adjustable foundations (though deeply integrated with Tempur-Pedic's Ergo smart bases).
• Key features: Provides minute-by-minute sleep tracking, heart rate, respiratory rate, and AI-based sleep coaching. It also tracks bedroom environment stats like temperature, humidity, and CO₂ levels.
• Bonus: If paired with a compatible smart adjustable base, it can automatically detect snoring and gently elevate the head of the bed to help stop it.

To help you pick the best fit, tell me:

• Do you have a standard bed frame/box spring or an adjustable/smart base?
• Are you looking to track just your sleep or your partner's too?

Under-mattress sleep trackers are an excellent, zero-effort alternative to smartwatches and rings because you never have to wear them, charge them, or remember to start a session . They use advanced pneumatic and motion sensors to track your sleep cycles, heart rate, and respiratory patterns directly through the mattress.

The top under-mattress sleep trackers currently on the market include:

Add to list

• Features high-accuracy tracking for sleep cycles (light, deep, REM), continuous heart rate, and snoring.
• Offers clinically validated breathing disturbance tracking to monitor signs of sleep apnea.
• Automatically syncs data via Wi-Fi to a free mobile app with zero required ongoing subscription fees.
• Integrates with smart home platforms like IFTTT to automatically trigger actions like dimming your lights when you get into bed.

Add to list

• Uses a dual-sensor processing system that tracks up to two sleepers individually on each side of the bed.
• Features built-in environmental sensors that measure bedroom temperature, humidity, and CO2 levels to help optimize your room for sleep.
• Integrates an AI sleep coach inside the app to deliver personalized daily tips based on your routine.

Important Compatibility Notes

Before buying, keep these physical requirements in mind:

• Power Source : These mats do not run on internal batteries; they must remain permanently plugged into a wall outlet near your bed.
• Bed Frames : They perform best on solid platform bases or box springs. If you have a slatted bed frame, you may need to place a small, flat piece of cardboard or plywood over the slats so the sensor pad stays perfectly flat.
• Mattress Types : They are fully compatible with standard spring, memory foam, and latex mattresses, but will not work with waterbeds or air mattresses.

To help narrow down the choice, let me know:

• Do you sleep alone or with a partner?
• Are you looking to track specific issues like snoring or breathing disturbances?
• What type of mattress do you have?

If you want a tracker that literally slides under the mattress and requires nothing to be worn, I’d look at the Withings Sleep.

• Withings Sleep - $99.95 (Withings)

Why I’d pick it

• Goes underneath your mattress — you don't wear anything while sleeping.
• Tracks sleep duration, sleep stages (light/deep/REM), heart rate, snoring, and sleep score.
• No charging; it stays installed under the bed and uses a power adapter.
• Works with spring, foam, latex, and memory-foam mattresses; Withings says it's been tested with mattresses 4–15 inches thick.
• The current Withings listing is $99.95, though prices can change.

If sleep apnea/breathing disturbances are particularly important to you, there's also the more advanced Withings Sleep Analyzer, which is designed for under-mattress use and adds more respiratory analysis.

• Withings Sleep Analyzer - $149.95 (Withings)

If you tell me your budget (e.g. under $100, $200, or $300) and whether you want sleep-apnea detection, I can narrow it down to the best 2–3 options.

If you specifically want a sleep tracker that slides under the mattress, I’d look at the Withings Sleep Analyzer first.

• Withings Sleep Analyzer - $175.05 (IoThings.store)

Why I’d pick it

• No wearable: the sensor sits underneath the mattress and tracks you while you sleep.
• Tracks sleep duration, sleep stages, heart rate, breathing disturbances, snoring, and sleep score.
• No nightly charging—it's powered from an outlet.
• Works with spring, foam, latex, and memory-foam mattresses; waterbeds aren't supported.
• You can use the basic sleep history and trends without a subscription; Withings+ is optional for additional insights.

Tom's Guide currently rates it as one of the better non-wearable sleep trackers, specifically highlighting its under-mattress design and sleep-apnea-related measurements.

One important caveat: if you're buying it specifically to diagnose sleep apnea, don't treat a consumer tracker as a diagnosis. Withings' U.S. consumer product currently describes its measurement as breathing disturbances, while its separate Sleep Rx product is the FDA-cleared clinical product.

If you tell me your budget (e.g. under $100, $200, or $300) and whether you want sleep apnea detection, heart-rate tracking, or just sleep stages, I can narrow it down to the best 2–3 options.

The gold standard (and practically the only major consumer-grade option left) for an under-mattress sleep tracker is the [Withings Sleep Tracking Mat Go to product viewer dialog for this item. ](https://www.withings.com/en-us/products/sleep?srsltid=AfmBOopn0ljBcf9YbLJ54EnDchNK7Zp280-7wfJdZMG2Q5dXFPIs9BQB) (sometimes marketed as the Withings Sleep Analyzer depending on your region).

Withings Sleep Tracking Mat

• How it works: It is a thin, discreet pneumatic sensor pad that slides right under your mattress (positioned at chest level between the mattress and your bed base/slats) and plugs into a wall outlet.
• What it tracks:
  • Sleep cycles (Deep, Light, REM) and total sleep duration.
  • Continuous overnight heart rate.
  • Snoring tracking and breathing disturbances (with medical-grade precision algorithms capable of screening for signs of sleep apnea).
  • Sleep Score and an automatic "Readiness" indicator.
• The Pros:
  • No wearables: Nothing to wear on your wrist or finger, and no batteries to charge—you just set it up once and forget it's there.
  • No mandatory subscription: All core historical tracking and data live in the free Withings app without forcing you into a monthly fee.
  • Smart Home Integration: Features IFTTT connectivity, meaning it can trigger smart home routines like turning off your lights or adjusting your thermostat when you get into or out of bed.
• The Cons:
  • Compatibility limits: It works great with spring, foam, and latex mattresses (from 4 to 15 inches thick), but does not work with waterbeds or air mattresses.
  • Single-side tracking: It tracks the person lying directly above it, so if you share a bed and both want data, you technically need two pads (one for each side).
  • Availability: Because consumer under-mattress tech is a niche market dominated by wearables, stock fluctuates, but you can typically find it directly on the Withings Store or via third-party retailers like Amazon.

Would you like help checking current pricing and availability for the Withings Sleep Mat, or do you want to explore alternative contactless options (like bedside radar/sonar monitors) just in case?

Yes — you’re looking for an under-mattress sleep tracker, so you don’t have to wear a watch or ring.

My top pick: Withings Sleep

Withings Sleep

$276.49

The Withings Sleep is a thin sensor mat that slides between your mattress and bed platform. It automatically tracks:

• Sleep duration and sleep/wake times
• Light, deep, and REM sleep
• Heart rate
• Snoring
• Breathing disturbances
• An overall Sleep Score

It’s about 5 mm (0.2") thick, requires no charging, and syncs your data to the Withings app over Wi-Fi.

Withings says it's compatible with spring, foam, latex, and memory-foam mattresses; it's been tested with mattresses 4–15 inches thick.

Price: Withings currently lists it at about $199.95.

If you specifically want sleep-apnea monitoring, there's also the Withings Sleep Analyzer, although its medical sleep-apnea functionality is region-specific.

Withings Sleep

$276.49

Withings Sleep Analyzer

$173.46

If you tell me your budget (e.g. under $100, $200, or $300) and whether you want sleep-apnea detection, I can narrow it down to the best 2–3 choices.

The gold standard and most popular standalone option that slides directly under your mattress is the [Withings Sleep Tracking Mat Go to product viewer dialog for this item. ](https://www.withings.com/en-us/products/sleep?srsltid=AfmBOopM68PJO1BHhE6Z1Dgoa2O5p01karJ7-BplXbf_sYy6hAyyO2zH) (also referred to as the Withings Sleep Analyzer Go to product viewer dialog for this item.).

Withings Sleep Tracking Mat

• How it works: It is a thin, discreet pneumatic sensor mat that slips horizontally under your mattress at chest/heart level. It plugs into a wall outlet and connects to your home Wi-Fi.
• Key metrics tracked: Sleep cycles (deep, light, REM), total sleep duration, interruptions, continuous nighttime heart rate, and snoring.
• Standout feature: It includes advanced acoustic and respiratory analysis capable of tracking breathing disturbances to detect signs of mild-to-severe sleep apnea.
• Smart home integration: Supports automations (via IFTTT or Alexa) so that getting into or out of bed can trigger smart lights, adjust your thermostat, or turn off appliances.
• Pros: Completely contactless (nothing to wear or charge), free basic app data with no mandatory subscription.
• Cons: Designed for single-person tracking per mat (if you share a bed and both want data, you'll need one for each side), and it is not compatible with waterbeds or thick air mattresses.

Alternative (Built into Smart Beds)

If you happen to use a compatible Tempur-Pedic Ergo smart base, the Sleeptracker sensors also slide underneath the mattress to provide automated sleep reports, snore-detection adjustments, and environment monitoring without wearables.

If you'd like, let me know:

• What type of mattress you have (foam, innerspring, etc.)
• Whether you sleep alone or with a partner

I can help you confirm if an under-mattress mat is the best fit or suggest alternative non-wearable options.

Yes — if you specifically want something that slides under the mattress and you don't have to wear, the Withings Sleep Analyzer is probably the best fit.

Withings Sleep Analyzer

$173.14

Why I'd pick it

• Sits underneath your mattress at chest level, so you don't feel it while sleeping.
• Tracks sleep duration, sleep stages, heart rate, breathing, interruptions, and snoring.
• Automatically records your nights through the Withings app.
• No nightly charging or wearable to remember.
• Current expert reviews continue to rank it as one of the best under-mattress sleep trackers.

One important caveat: sleep-stage trackers aren't equivalent to a clinical sleep study, so I'd treat the data as useful trends rather than medical measurements.

If you tell me your budget (e.g. under $100, $150, $200) and whether you use iPhone or Android, I can find the best currently available under-mattress options and compare them.

The gold standard—and virtually the only major consumer-grade option left on the market—for a non-wearable, under-mattress sleep tracker is the Withings Sleep Tracking Mat Go to product viewer dialog for this item. (sold as the *Withings Sleep Analyzer Go to product viewer dialog for this item. * in some regions).

[Withings Sleep Tracking Mat Go to product viewer dialog for this item. ](https://www.withings.com/en-us/products/sleep?srsltid=AfmBOoruF4uUSPbG4F_uodwitBaOdU0pSH2_CnSvz2OV07qPmL9KyK2y)

• How it works: It’s a thin, discreet pneumatic sensor pad that slides horizontally underneath your mattress at chest/heart level (sandwiched between the mattress and your bed frame or box spring). It connects to your home Wi-Fi and automatically records data every time you get in and out of bed.
• Key Metrics: Tracks sleep cycles (deep, light, REM), total sleep duration, interruptions, continuous nighttime heart rate, snoring episodes, and breathing disturbances.
• Medical Insights: Features clinically validated detection for breathing disturbances to help screen for signs of sleep apnea.
• Smart Home Integration: Supports IFTTT integrations, meaning it can trigger smart home routines—like turning off your lights or adjusting your thermostat—automatically when you fall asleep or wake up.
• Cost & Subscriptions: Generally retails around $200. The companion smartphone app provides free, unlimited access to your history and sleep scores with no mandatory monthly subscription.
• Compatibility Notes: It works with most standard mattress types (spring, foam, latex) between 4 to 15 inches thick, but is not compatible with waterbeds or air mattresses. It tracks only the single person resting directly above the pad.

Would you like to know more about how under-mattress sensors compare to wearable rings or smartwatches , or are you looking for details on compatibility with your specific mattress type?