[lpsz]

No kidding -- I routinely code late into the night. Each time, I can't fall asleep if I didn't have f.lux on a fairly "yellow" setting.

I (a) wish that something like that was built into iOS and (b) feel bad for people who don't know f.lux exists (or RedShift, for Linux folks.)

[nikunjk]

f.lux is the only reason I have a jailbroken iPhone. I can no longer stare into other people's phones at night without f.lux