The SNOO rocks and plays white noise once it hears your baby fuss and cry. It rapidly increases the rocking motion up five levels until the baby stops crying and then gradually moves slower and slower. Happiest Baby—the makers of SNOO—recommend tending to your little one if they’re still crying one minute after the SNOO starts rocking.
You can customize the motions based on your baby’s preferences, and there are special modes for premature infants and 6-month-olds nearly ready for a crib.
The SNOO features a breathable mesh design for good air circulation, special swaddle clips that keep your baby on their back, a quiet motor, and a waterproof mattress cover. It also comes with a smartphone app that lets you view sleep reports, adjust motion settings, and find out what the SNOO’s currently doing.
It’s impractical for most parents to spend over $1,500 on a device that’s used for 6 months, but you can save some money by using SNOO’s rental program or scouring your local consignment shops and used listings.
If you do buy the SNOO full-price, there’s a good chance you’ll be able to resell it and get most of your money back once your baby outgrows it. Or you can keep it in the family for future babies since its motor supposedly lasts for over 10 million cycles.1 Just note that the warranty expires after 12 months and that you should always buy new swaddle sacks.
We talked to several parents who used the Happiest Baby SNOO Smart Sleeper, and they had mostly positive feedback.
“It definitely saved us from some sleepless nights,” said Clara S. “If my daughter made even a peep of sound, the SNOO would automatically start swaying, and if she didn't actually need to be fed or need her diaper to be changed, she would fall back asleep.”
Clara also praised the custom settings in the app and said it alerted her if her daughter actually needed hands-on attention.
Another SNOO user, Sasha H., also had good things to say about the app: “It showed me what happened through the night and allowed me to adjust the soothing remotely from my phone.”
Sasha liked the SNOO’s all-night responsive rocking, but she had some criticisms. “The higher-intensity movement did not actually soothe my baby at all,” she said, also noting that she couldn’t turn off the white noise—it always came on when the SNOO rocked.