Recent research suggests that exposure to blue light before sleep can distort your natural (circadian) rhythm and cause you to fall asleep. The cause is the photoreceptor in your eyes, called Melanopsin. This receptor is sensitive to a narrow band of blue light in the 460-480nm range that can suppress the production of melatonin, a hormone responsible for your healthy sleep and wake cycles. It filters the flow of blue light emitted by your phone or tablet after sunset and protects your eyes with a soft and pleasant red filter. The intensity of the filter adjusts smoothly to the sun’s cycle depending on the local sunrise and sunset times.

Supported Android
(4.0 and up)
Ice Cream Sandwich (4.0 – 4.0.4),Jelly Bean (4.1 – 4.3.1),KitKat (4.4 – 4.4.4),Lollipop (5.0 – 5.1.1),Marshmallow (6.0 – 6.0.1),Nougat (7.0 – 7.1.1),Oreo (8.0-8.1), Pie(9.0)

Download Twilight Blue light filter Pro 9.8 APK

Twilight-Pro-v9.8_build_315.apk