The Twilight application makes the screen of your device adapt to the time of day. 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 cycle according to the local sunset and sunrise times. Recent research suggests that exposure to blue light before sleep can distort its natural (circadian) rhythm and cause the inability to fall asleep.
(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)