Hatch Sleep Clock Accuracy Review: How It Compares With Apple Watch and Oura

To evaluate the Hatch Sleep Clock’s accuracy, I compared its measurements with those from the Apple Watch Series 12 and Oura Ring 5. Hatch says the first few nights are an adjustment period, so its data may be less accurate during that time.

Estimates of total sleep duration were generally consistent across the devices. The biggest differences appeared in sleep-stage tracking—a metric I tend to discount regardless of which sleep tracker I’m testing. Although sleep stages can offer additional context about broader sleep patterns, I’m skeptical that consumer devices relying primarily on motion-based tracking can accurately map minute-by-minute brain activity throughout the night.

Hatch Sleep Clock Placement Affects Accuracy

The biggest drawback of the Hatch Sleep Clock is that its placement can significantly affect tracking accuracy. Hatch instructs you to place the device on your nightstand at approximately the same height as your mattress and point it toward your chest while you’re lying down.

The clock must be positioned 2 to 4 feet from your body, with an unobstructed path between the device and you. If your nightstand is too low, you may need to prop the clock on a stack of books. If it’s too high, you may need to raise the mattress or install a wall-mounted shelf beside the bed.

Fortunately, my bed and nightstand were already at the right height. However, my nightstand is usually cluttered with ornaments, so I had to remind myself to move them behind the Hatch. It’s a small annoyance, but I suspect it affected the device’s tracking accuracy. Unfortunately, there was no way to confirm this because the app doesn’t flag data gaps. Tracking only stops when the device can’t detect a person or becomes disconnected.

What Couples Should Know About Hatch Sleep Tracking

Unlike mattress covers such as Eight Sleep, which can monitor two sleepers at the same time, Hatch measures only the person closest to the device. Sleeping position also affects tracking accuracy, so couples who share a bed should keep this limitation in mind.

Privacy Features: No Camera or Microphone

Sleepers who value privacy can rest assured that the Hatch Sleep Clock doesn’t point a camera or microphone at them while they sleep. The tradeoff is that it can’t detect snoring or other sleep disturbances.

Hatch also says the device communicates over your local network without accessing your home network or logging your communications.

Is the Hatch Sleep Clock Worth It?

The Hatch Sleep Clock wasn’t enough to make me abandon the many sleep trackers already strapped to me, but it did earn a place in my bedtime routine. As if I needed another sleep aid.