It is a screen filter application that blocks blue light of 400 ~ 450 nm band.We use 700 ~ 750 nm as compensation color band for blue light interception.The 700 to 750 nm band is the most comfortable color gamut of visible areas.Free, low-volume app.Your smartphone or tablet screen will generate a blue light.
https://andro.io/app/neoscreenfilter
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Screen Filter: blue light off for Android – Latest Version & Features
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> 2.2k
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~$900
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