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

NPR

Apps Can Cut Blue Light From Devices, But Do They Help You Sleep? NPR If you're losing sleep over the blue light coming from your phone, there's an app for that. In fact, there are now lots of apps that promise to improve sleep by filtering out the blue light produced by phones, tablets, computers, and even televisions ... and more »

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