Android Nougat vs Android 6.0 Marshmallow Walkthrough: What’s New

Night Mode

With Android Nougat Google finally added what's called Night Mode. This will lower screen brightness and cut out blue light during specific times of the day. Using night modes makes the entire screen have a red tint, but it's easier on the eyes and helps you fall asleep at night. There's even an option to turn the settings menu dark at night, rather than glowing bright white. 

This is basically a red filter over the screen similar to popular apps like Twilight, but at a system level for all of Android. This works the same as Night Shift on the iPhone.