@nerdvid said in preview root only:

i also think it need root access.

why?

@herf Thank you for your reply.

it will not work on newer android devices, due to Google's change in allowing access to screen space overlay rendering. sad.

you can root and flash a kernel with K-Lapse , then use a kernel manager app to create your own custom settings according to either available light or time of day.

also some native roms have night shift which is pretty similar to f.lux, just not much control over it.

which phone do you have? and what rom are you running

Same. I've got a LG K61

I think so this might be happening because your app might not be updated. Just update the app and restart your phone.

There's just no reason why a "clear" screen protector should make any difference to sleep or alertness.

how about an apk file to sideload from apknite store?