NPR News: Apps Can Cut Blue Light From Devices, But Do They Help You Sleep?

Apps Can Cut Blue Light From Devices, But Do They Help You Sleep?
Lots of phone and tablet apps promise to improve sleep by filtering out the blue light from device screens. But that won't help if the reason you're not getting enough shuteye is caffeine or stress.

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November 27, 2017 at 05:02PM
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