By Sarah Kovac

There is no shortage of activity trackers on the market today, and many of those boast at least some level of sleep tracking. But there are a few devices that are focused solely on your sleep. If you’re waking up groggy or having trouble falling and staying asleep, you may need more than a jack-of-all-trades type of activity monitor. Sleep sensors like the S+ use sophisticated motion detection and algorithms to give you a detailed picture of how you sleep and why.

I tried the S+ for a couple of weeks and was impressed by its ease and helpful suggestions. I didn’t have to worry about an irritating band around my wrist or making sure a sensor hadn’t shifted under my mattress. The S+ just chilled there on my night stand an observed. That’s something very new in the activity monitor world, and it’s what sets ResMed’s sleep sensor apart from the competition.

Product: S+ by ResMed

How it works: The S+ uses ultra-low-power radio waves to detect upper-body movement as you sleep. These waves work much like echo location and bounce off of watery objects, such as the human body. Using this technology, the S+ can “see through” blankets and sheets to detect the rise and fall of your chest as you breathe, how much you toss and turn and even how much time you spend in each stage of sleep – all without touching you or your bed.

Pros: World’s first non-contact sleep sensor. Tracks how alcohol, exercise, caffeine and stress affect your sleep. Compact for travel. Offers suggestions to improve sleep quality.

Cons: No built-in speaker (uses your phone for sound).

Where to buy: You can buy the S+ on ResMed’s website or on Amazon.

How much: $129 with free 3-5 day shipping from ResMed or Prime from Amazon

Best feature: The best thing about the S+ is the hassle-free factor. You won’t find a sleep monitor that’s easier to set up and use.

Worst feature: Though I have few complaints about the S+, its strength is also its Achilles’ heel. Because there is no physical element monitoring your movement, you have to hope you’ve positioned the S+ in such a way that it picks up your movement and not those of your partner/pet/child who had a nightmare. After a couple nights of experimentation I think I perfected the placement, so this is a pretty minor complaint.

Reviewers recommendation:  The S+ by ResMed is a quality piece of tech. I love that it tracks other aspects of my day and uses that information to offer me recommendations. It’s small and can be removed from its stand for travel, though I would be hesitant to pack it in my checked luggage for fear of damage in transit. If you’re looking for an easy way to keep an eye on your sleep over time and improve your sleep quality, the S+ is for you. However, users looking for more built-in bells and whistles might find the Withings Aura more appealing.

Tags:  Product Review Tech

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