There are countless apps that are meant to help send you off to sleep or help you keep track of your sleeping (and snoring) habits, reports the Los Angeles Times.

“The light from these devices reduces the levels of melatonin, a hormone that helps us fall asleep. People who use these devices take longer to fall asleep and spend less time in restorative REM [rapid-eye movement] sleep,” said Dr. Nathaniel Watson, president of the American Academy of Sleep Medicine.

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