There are lots of devices out there that track your sleep, but there's now a product that's meant to both track and improve your sleep.
It's a "smart pillow" called Chrona, and it launched on Kickstarter on Thursday. Chrona is a thin memory foam pillow that sits on top of your regular pillow and tracks your sleep with a built-in accelerometer. The pillow wirelessly syncs with your smartphone via an app. Its creators are looking to r...
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