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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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By KPCC 89.3 | Southern California Public RadioLots 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.