Descriptions : The Twilight app adapts your device's screen to the time of day. It filters the blue luminous flux of your phone or tablet after sunset and protects your eyes with a soft and pleasant red filter. The filter intensity is continuously adjusted to the solar cycle based on your local sunset and sunrise times. Required Android Versions : Jelly Bean [4.1–4.3.1] - KitKat [4.4–4.4.4] - Lollipop [5.0–5.0.2] - Marshmallow [6.0 - 6.0.1] - Nougat [7.0 – 7.1.1] - Oreo [8.0-8.1] Twilight-Pro-v12.9_build_456.apk