In Depth Baby Product Reviews Led by a Pediatrician

SNOO Smart Sleeper Review

A well-built bassinet that might help soothe, but the EMF exposure is risky
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SNOO Smart Sleeper Review
Credit: Abriah Wofford
Price:  $1,695 List
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Manufacturer:   Happiest Baby
By Juliet Spurrier, MD, Abriah Wofford  ⋅  Feb 21, 2025
75
OVERALL
SCORE


RANKED
#4 of 11
  • Ease of Use - 35% 5.0
  • Breathability - 25% 10.0
  • Sleep Surface - 20% 8.0
  • Quality - 15% 9.0
  • Eco-Health - 5% 5.0

Our Verdict

The SNOO is a unique soothing bassinet thanks to its smart features, and it earned an impressive overall score, but the EMF emissions seem risky. This bassinet claims to be a miracle worker when it comes to fussy or colicky babies and has helped many a desperate mother with its rocking motion and white noise. While this hefty bassinet is not one you'll be taking with you on weekend trips, or even moving from room to room often, you can't deny the modern, stylish design, and high level of quality. However, this is by far the most expensive bassinet in the review. It also emits EMF, which is not found in any of the competing products and is something parents should consider very seriously. If your newborn is super fussy or struggles to stay asleep, then the SNOO may be the ticket to getting consistent quality sleep, but only if you can peacefully sleep knowing the EMF risks.
REASONS TO BUY
Good at soothing
Stylish
Effective safety features
REASONS TO AVOID
Concerning EMF
Expensive
May not work for every baby

Compare to Similar Products

 
snoo smart sleeper
This Product
SNOO Smart Sleeper
Awards  Top Pick Award
Premium Quality Co-Sleeper
Editors' Choice Award
Best Overall Bassinet
Best Value Award
Budget-Friendly Bedside Bassinet
Top Pick Award
Best For Small Spaces
Price $1,695 List
$1,271 at Amazon
$290 List$220 List
$220.00 at Amazon
$180 List
$159.99 at Amazon
$330 List
$329.99 at Amazon
Overall Score Sort Icon
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Bottom Line Innovative and may soothe fussy babies, but there is some EMF exposureBeautiful and functional wood bassinet you can use from your bedA great choice for co-sleeping that is easy to move from room to roomA good co-sleeping or free-standing bassinet for money-conscious familiesA versatile, quality option with a small bedside footprint
Rating Categories SNOO Smart Sleeper babybay Bedside Sle... Arm's Reach Clear-V... Baby Delight Beside... Chicco Close to You...
Ease of Use (35%)
5.0
6.0
8.0
8.0
7.0
Breathability (25%)
10.0
10.0
7.0
8.0
8.0
Sleep Surface (20%)
8.0
7.0
9.0
7.0
6.0
Quality (15%)
9.0
10.0
8.0
7.0
8.0
Eco-Health (5%)
5.0
7.0
3.0
4.0
5.0
Specifications SNOO Smart Sleeper babybay Bedside Sle... Arm's Reach Clear-V... Baby Delight Beside... Chicco Close to You...
Assembled Weight 35.1 lbs 28.6 lbs 22.1 lbs 17.5 lbs 32.6 lbs
Open Dimensions 31.0"H x 35.5"L x 20.0"W 37.1"H x 36.0"L x 20.7"W 34.8"H x 34.5"L x 20.3"W 26.0"-30.5"H x 39.0"L x 27.0"W 37.0"-47.0"H x 33.0"L x 27.5"W
Age/Height/Weight Limit 6 Months or 25 lbs
Discontinue Use When Infant:
Pushes Up On Hands And Knees
5 Months
Discontinue Use When Infant:
Pushes Up On Hands And Knees
Discontinue As An Attachable Baby Bed When Infant:
Rolls Over Or Pulls Up To A Kneeling, Sitting Or Standing Position
5 Months or 18 lbs
Discontinue Use When Infant:
Pushes Up On Hands And Knees
5 Months or 20 lbs
Discontinue Use When Infant:
Pushes Up On Hands And Knees
20 lbs
Discontinue Use When Infant:
Pushes Up On Hands And Knees
Product Care Sleep Sack, Sheet: Machine Wash, Tumble Dry
Mattress, Mesh, Frame: Spot Clean
Wipe Down Mattress: Spot Clean
Sheet: Machine Wash, Tumble Dry (No Heat)
Metal Frame: Spot Clean
Lining: Machine Wash, Drip Dry
Mattress Cover, Mesh: Machine Wash Matress Cover
Mesh: Machine Wash, Drip Dry
Plastic Frame: Spot Clean
Bassinet Mattress Height Above Floor 22.0" 3"-27"
Adult Mattress Height
10"-31"
19.5"-25.5"
Adult Mattress Height
24"-30"
14" - 19"
Adult Mattress Height
18.5"-24"
23.3"-33.1"
Special Features SNOO Sack Attaches To Safety Clips, 3 White-Noise Sounds, Rocks Baby When Baby Cries, Adjustable Settings, Mobile App For Alerts, Reports and Settings, Ambient Light Sensor Solid Wood Adjustable Legs Foldable Height-Adjustable, Changing Table Up To 35 lbs, 6 Melodies, 2 Vibration Settings, Nightlight
Modes Freestanding Bassinet Bedside Sleeper Freestanding Bassinet
Bedside Sleeper
Bedside Sleeper
Freestanding Bassinet
Portable
Bedside Sleeper
Freestanding Bassinet
Chemical Flame Retardant Free Yes - no detectable levels Yes - don't "use" but OEKO-TEX excludes most Yes - don't "use" Yes - no flame retardant "treatment"
Portable Design No No No Yes No
Wheels No No Yes Yes Yes
Mesh Sides Yes No - Slats Yes Yes Yes
Included Accessories Organic Cotton Snoo Sacks (Small, Medium, Large), GOTS-Certified Organic Cotton Sheet, Water Resistant Mattress Cover None Polyester Sheet Waterproof Sheet Polyester Mattress/Changing Pad Cover
Available Accessories Snoo Sack, SNOO Smart Sleeper 100% Organic Cotton Fitted Sheet, SNOO Leg Lifters (2-pack), SNOO Shorty Legs Classic Mattress, Relief Wave Mattress, Tranquility Wave Mattress, 100% Cotton Sheet, 100% Organic Cotton Sheet, Classic Cotton Mattress Cover, Relief 61% Polyester/39% Cotton Mattress Cover, Tranquility 52% Polyester/47% Lyocel/1% Cotton Mattress Cover, Dry Comfort Water-Resistant Mattress Cover, Boxspring Resistance Plate, Bassinet Conversion Kit, Bedframe Anchor Kit, Bassinet Hook Parts, Full Hardware Kit, Babycare Organizer, Barrel Assembly Kit, Canopy, Organic Canopy, Canopy Holder, Rolling Casters, Mobile Holder Arm's Reach® Clear-Vue™ Au Naturel Mattress Pad, Puppy Luv Music Box, Replacement Strap and Plate 100% Cotton Sheet Mattress/Changing Pad Cover, Polyester Sheet, Diaper Caddy
Set Up Time 39:14 29:20 (58:34 total with redo) 6:50 21:18
Materials GOTS Certified Organic Cotton And Polyester Mesh Sleep Sack, 100% Organic Cotton Sheet, Polyester and Polyurethane Cover, Nylon and Polyester Mesh Oeko-Tex Certified Fabrics, Cotton, Beechwood, Water-Based Finishes Strong Nylon Cloth, Cotton Polyester Blend, Polyester, Nylon Woven Strapping, Polyurethane Foam, MDF board Polyester, Polyester Fiber Batting, MDF Board GreenGuard Gold Certified 100% Polyester Body, 100% EVA Mattress Cover, 100% Polyester Sheet, Composite Wood Board

Our Analysis and Test Results

snoo smart sleeper - the simple, modern design of the snoo will go well with any home...
The simple, modern design of the SNOO will go well with any home decor.
Credit: Abriah Wofford

The SNOO Smart Sleeper is an innovative bassinet designed by the author of the Happiest Baby On the Block Book, Dr. Harvey Karp, and his wife, Nina Karp. It is based upon the principle of the Five S's and uses swaddling, swaying, and shushing (white noise) to soothe babies in this bassinet. Dr. Karp also offers a variety of DVDs and books designed to help parents better understand and navigate a newborn's (as well as toddler's) fussiness, sleep, and developmental issues. He is a well-loved and highly respected member of the pediatric community.

Alert: $20 Subscription Service Effective July 2024

The SNOO recently started a subscription service through their app. This service is required if you hope to use all of the features and functionality. If you buy SNOO from the company, you get nine months of free service. However, if you buy it used or plan to use it with a second baby, you will need to sign up for the subscription and pay a $20 monthly fee to use all the features, adding to the already expensive cost. Additionally, they sprung this change on customers who bought products before the change and then lost certain functionalities of their Snoo. This decision to move to a subscription service model is a big bummer and could inhibit your ability to sell your Snoo when your baby days are over. Here are the features you lose if you choose not to buy the premium subscription:

  • Car Ride Mode
  • Level Lock
  • Sleepytime Sounds
  • Responsiveness Settings
  • Motion Start Level
  • Weaning Mode
  • Daily Log and Weekly Summary
  • Ability to Control Multiple SNOOs
  • Premium Articles / Expert Advice (Pregnancy to Toddlerhood)



Performance Comparison


snoo smart sleeper - the mesh sides of the snoo are both breathable yet sturdy and well...
The mesh sides of the SNOO are both breathable yet sturdy and well fitted to the frame.
Credit: Abriah Wofford

Ease of Use


The SNOO Smart Sleeper had an average ease-of-use score. While it can make your life easier thanks to the unique features it offers, it is significantly more involved than your average bassinet and may have more of a learning curve in the beginning, should you choose to use it with your smartphone.


Below we delve into ease of use specifics of accessibility, portability/mobility, additional features, ease of setup, and cleaning.

snoo smart sleeper - the snoo has a very narrow profile, keeping it unobtrusive in the...
The SNOO has a very narrow profile, keeping it unobtrusive in the bedroom and also easy to fit through halls and doorways.
Credit: Abriah Wofford

Accessibility


The legs included with the SNOO are not adjustable, so the bassinet height cannot be changed to match the height of your mattress unless you purchase a different set of legs. The level of the baby sleep surface is a few inches lower than your average 25-inch bed, while the upper rail reaches a few inches higher. This design means you'll need to reach up and over the top edge and then below waist level to get your baby without leaving your bed. If this sounds uncomfortable, that's because it probably is. So, while it is possible to reach the baby without getting out of bed, you'll likely find it easier to swing your legs over the bed edge to give the whole operation a bit more stability.

snoo smart sleeper - the bassinet is nestled down deep in mesh walls. this may be better...
The bassinet is nestled down deep in mesh walls. This may be better for keeping baby protected, but make it more difficult to reach your little one from bed.
Credit: Abriah Wofford

Portability/Mobility


The SNOO is not very portable. At 35.1 pounds, it is the heaviest bassinet in this review, and it does not fold down or come apart for smoother transportation. It is not very large, so it can easily fit through door frames and hallways, but the weight may deter you from moving it from room to room.

snoo smart sleeper - the snoo has only one on/off button and goes to work automatically...
The SNOO has only one on/off button and goes to work automatically when it “hears” your baby start to cry.
Credit: Abriah Wofford

Additional Features


This “Smart Sleeper” has a strong emphasis on the additional features it offers with the most extras by far of all the bassinets in this review. And you'll have to pay $20 per month for access to all the features. Perhaps the most notable is the soothing ability of the “wiggly” mattress. A microphone located in the base of the SNOO detects crying and then tells the motor to start working through four increasingly vigorous levels of rocking to soothe the baby. The speaker system automatically chooses one of four levels of white noise. If your baby has not calmed down after three minutes, the SNOO shuts off, as the baby likely needs some human attention. If you prefer to adjust rocking speed and noise level on your own, you can do this through the app. The SNOO app also logs your baby's sleep and keeps track of things like day sleep, night sleep, total sleep, the longest stretch of sleep, and the number of times the baby woke up while in the SNOO.

snoo smart sleeper - stretchy fabric found on both sides of the swaddle slip over a...
Stretchy fabric found on both sides of the swaddle slip over a plastic hook in the side of the bassinet. This keeps baby on their back and in the middle of the mattress at all times.
Credit: Abriah Wofford

Included with the bassinet are one fitted sheet and three swaddle sizes. The swaddles work specifically with the SNOO. They have tabs that slide over hooks on either side of the bassinet. These keep baby in the center of the mattress and always on their back. The SNOO will not function with swaying and shushing unless you properly clip the swaddle into the hook. We recommend purchasing an additional sack in each size for cleaning purposes in the event of leaking accidents or spit-up (more on cleaning in a bit).

Ease of Setup


The setup process for the SNOO is one of the easiest in the group. Straight out of the box, the bassinet calls for minimal assembly and zero toolage. The initial setup involves very few steps of snapping in the legs and hand tightening the bolts that keep it sturdy. The only possible mix-up is inserting the legs backward. This mistake doesn't affect the functionality of the bassinet, but it looks strange. After assembly, you only need to plug it in and secure the sleep sack for day-to-day use.

snoo smart sleeper - the included swaddles attach to the sides of the bassinet to ensure...
The included swaddles attach to the sides of the bassinet to ensure that baby doesn't roll and stays in the center of the cradle.
Credit: Abriah Wofford

Cleaning


Both the sheets and sleep sacks that come with the SNOO are machine-washable. Other items in the sleeping area, such as the mattress, mesh sides, and base, can be wiped or spot cleaned with a damp cloth and mild detergent when necessary. The support beneath the mattress is hard plastic and is easy to wipe down, but you may have a bit more trouble with the mesh sidewalls should they become soiled.

Breathability


The SNOO was one of the top scorers for breathability, impressing us with the thought that went into making this a safe sleep space for babies.


The sidewalls are breathable double-layered mesh fabric that allows for good airflow around the bassinet. Thanks to the clip-in swaddle, the baby is held securely in place, eliminating the chance of a baby rolling or wriggling themselves up against the side.

snoo smart sleeper - the sleep surface adheres to the astm standard that requires...
The sleep surface adheres to the ASTM standard that requires bassinet mattresses to be 1" thick or less.
Credit: Abriah Wofford

Sleep Surface


The SNOO's sleep surface earned one of the higher scores in this metric.


The mattress is very stable and fits well in the bassinet. It shifts slightly from top to bottom, but there wasn't enough room to squeeze more than one finger between the mattress and the side mesh. It is not attached to the base in any way, but after clipping in baby with the sleep sack, it should stay in place well. It was one of the most firm in the group.

Quality


The SNOO earned a great score for quality, coming in alongside a few other top products. For a bassinet in this price range, we would expect no less.


The four legs come out from the bassinet and have rubberized foot pads that make it extremely stable. The low center of gravity and the substantial weight of the SNOO also help to eliminate the risk of tipping. All odds and ends are tucked away for a simple and stylish, mid-century modern look, and there are no sharp edges, pinch risks, small parts, or mattress gaps to cause worry. The fabric and mesh are snug and fitted, and the other materials have a smooth assembly for a great fit and finish. The mattress adheres to ASTM standards and is still comfortable enough for baby.

snoo smart sleeper - the angled legs and rubberized feet ensure there is no risk of...
The angled legs and rubberized feet ensure there is no risk of slipping or tipping with the Smart Sleeper.
Credit: Abriah Wofford

The SNOO is a well-built bassinet that should last through multiple children. We think of it more as a long-term investment should you desire to welcome further babes into your family in the years to come.

Eco-Health


The SNOO earned a score that is just above average for the group.


It is clear that on the Happiest Baby website, sleep safety is the top priority, but there is little information on the eco-health of the Smart Sleeper. After some digging around, we found that the bassinet is JPMA certified, both the sheets and the swaddles are GOTS-certified organic materials, and there are no detectable levels of fire retardant chemicals.

However, it does have a polyurethane foam mattress, just like most other bassinets in this review, which aren't ideal for developing babies due to off-gassing VOCs. At this high price point, more inert material should be used, such as polyethylene, to limit this potential risk. The crib mattress market is already beginning to swing away from polyurethane, and we'd like to see the bassinet and travel crib market do the same.

snoo smart sleeper - at the approximate position of the baby's head, the emf levels were...
At the approximate position of the baby's head, the EMF levels were much higher than ambient EMF levels. This concerns me about the level of sustained EMF exposure for an infant. Parents should seriously consider EMF exposure before purchasing the SNOO.
Credit: Abriah Wofford

EMF Information


Unlike any other bassinet, this unit uses WiFi technology to talk with your smartphone or tablet to set up or modify how the SNOO operates. As a result, it emits EMF, to which your baby is then exposed. Some studies indicate that exposure to EMF (prolonged or continuous) can potentially cause long-term health problems down the road. The EMF reader reported 4.4 V/m on average next to the power button. When using the meter inside the bassinet where the baby will sleep, levels were somewhat lower, with an average reading of 2.35 V/m. This slightly lower reading is likely a result of the manufacturer's design that has a shield plate between the baby and the EMF source, indicating SNOO manufacturers are also aware of the EMF issue. But, we feel that the EMF shielding on the SNOO is insufficient.

The level of EMF is almost as concerning as that measured on some of the wearable movement monitors. If you are trying to limit your baby's EMF exposure (which we think parents should), the SNOO is a product to avoid. The EMF levels give me pause and make the SNOO a bassinet we wouldn't feel comfortable recommending to a friend. Because your baby can sleep in almost any other product without the risk of EMF exposure, it is hard for us to say we feel comfortable with newborns being exposed to EMF when they don't need to be.

snoo smart sleeper - emf levels on the sleep surface were 3.5x higher than ambient emf...
EMF levels on the sleep surface were 3.5x higher than ambient EMF. This is about the same as a Fitbit's EMF level, and about 20% of an iPhone's EMF if placed next to the baby's head.
Credit: BabyGearLab

We would love this product if there were a way to use it without EMF involvement like a simple on/off switch for the WiFi radio. Why has Dr. Karp allowed his otherwise compelling product to use a design that forces parents to accept exposing their baby to significant levels of EMF? We feel this is a product design failure, and hope this is something Dr. Karp and the folks at Happiest Baby will address in future versions so parents concerned with EMF have the option to soothe their baby using the SNOO.

Disabling WiFi on the SNOO?
The manufacturer provides a diagram of how to disable WiFi on the SNOO, but doing also disables much of the functionality. The company states the “full benefits of SNOO” are not available without WiFi, and it's unclear what features, if any, still work without WiFi.

Manufacturer Video



Juliet Spurrier, MD, Abriah Wofford