This app draws a translucent mask over screen,
it can : * Block blue light, for your health. * Dim screen at night, feel comfortable.
Similar to iOS Night Shift.
Blue light is bad for health, learn more: www.bluelightexposed.com https://en.wikipedia.org/wiki/High-energy_visible_light www.health.harvard.edu/staying-healthy/blue-light-has-a-dark-side
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