We posted a root-only build of f.lux in the Play Store.
(Thanks to reddit for helping convince us to make this build public.)
Currently, it works well on most Lollipop and Marshmallow builds of Android (5.x and 6.x), aside for some Samsung phones. (We’re looking into that.)
It also works on some KitKat phones (including Nexus 4).
We appreciate all the help and feedback, and as always, the best place to report bugs or compatibility issues is in our forum.
This build has the same “bedtime” timing you can find in our OS X build, with the ability to set your wake time. So it should work for people on a wide variety of schedules.