Android (root): F.lux is one of our favourite tools for automatically changing the colour temperature of your monitor based on the time of day. Now, it's arrived on Android, but you'll need root to use it.
Other colour temperature balancing apps have come to Android while we waited for f.lux, but many of them work by rendering a coloured overlay on top of your apps. This isn't the ideal way to change the colour temperature of a display, as it can cause some elements to be displayed very weirdly.
F.lux instead changes the colour temperature of the display at a system level, which should result in more accurate (if adjusted) display colours. The downside is this process requires root. Moreover, a very similar feature is currently available in the Android N preview, and it's unclear if it might roll out to everyone once Google releases N to the public. Until we find out, f.lux is a great option for rooted users in the meantime.