Ha ha... Looks like the choppiness has passed on to my phone! On my laptop and desktop, it was flying... Mobile version is pretty clunky ui wise!

I used Twilight on my phone for a while, but now my version of Android has it baked in. I never bothered with the computers though! I think the blue light component of the white light has a energising effect on us... But I seem to remember read somewhere that it wasn't definitely proven yet? I have to check again...