[geoffpado]

iOS does have a red monochrome option! Settings > General > Accessibility > Display Accommodations > Color Filters > Color Tint

Not the easiest to find, but it's there for people who need/want it.

[Fnoord]

> (in case you need to finish that paper at 2 am but don't want to keep your roommates awake).

Like iOS, macOS has native Night Shift mode as well. Or you can use F.lux

[killjoywashere]

Not the same. Nocturne turns white black and black red.

But have an upvote for the suggestion!