Update: i used it last night, it seemed to help a lot. I cant be sure if it was due to being exhausted, but ill keep trying it!

Thanks ill try this one out.

There's also CF.lumen [0], which I have running. It works best if you are rooted and can install the display driver. However, on non-rooted devices it behaves in a similar fashion to the other night time colour shifting apps.

[0] https://play.google.com/store/apps/details?id=eu.chainfire.l...

Oh thanks, i cant root unfourtanetly, doco (japan), has their phones locked down. At least havnt found a reputable guide lol.