SMART RINGS, BANDS, AND watches will all tell you how you slept last night, down to your heart-rate variability (HRV) and blood oxygen. They track how long it took you to nod off, how often you stirred, and how much of the night you spent in deep sleep and REM. It’s a remarkable amount of insight for a device that sits on your wrist or finger all night.
There’s just one big, annoying, unavoidable catch: Whatever wearable you prefer, you have to keep the thing charged. A smartwatch is the worst offender. You have to top it off sometime during the day, maybe while you shower, so it doesn’t die in the middle of the night.
Smart rings and bands last longer—up to a week or two between charges—but even then, not everyone finds them comfortable to wear overnight (and comfort can be an issue with watches at night as well). The good news is a newer group of trackers is starting to emerge with a fix. They don’t go on your body, and they don’t need charging.
Instead, they sit on your nightstand or slide under your mattress, fading into the background so you barely know they’re there. The Hatch Sleep Clock is one of the newest contactless trackers on the market. It sits on your nightstand, a few feet from you and pointed at your torso, and uses non-contact radar to pick up your presence and movement.
After an initial setup through the Hatch app, you press a button on top of the clock to start tracking each night. Rather than giving you a nightly score, Hatch looks for patterns across days and weeks, then suggests small routine changes to improve your sleep. The brand argues that nightly scores can make people more anxious about sleep, which undercuts the whole point of tracking.
Hatch’s recommendations take about a week to kick in, since the Sleep Clock needs a few nights to learn how you sleep first. Say your bedtime keeps drifting later as the week goes on. The Sleep Clock will notice the shift and suggest ways to get back on schedule.
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