If you already have trouble sleeping, then you may not need the pressure of getting rated. However, the app will provide "expert advice" from a Harvard sleep expert on how to improve it by changing nutrition, exercise and other factors. SleepSense also works with Samsung's SmartThings IoT home automation system. When it detects that you've fallen asleep, it can turn off lights or the TV and lower the air conditioning, for instance. It sounds pretty good, but while it's launching in Korea later this year, there's no word on a US or European arrival, and we still don't have the all-important price.

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