It's setting your phone/screen to stop displaying color, instead just showing everything in greyscale. I believe that on Android you can currently set something like a bedtime for your phone that will stop displaying colors at a certain time, and if you have any time limits for apps then during the last minute before you run out of time it will turn grey too.
Interesting! I'll have to give this a try and see what effect it has on my social media usage. My new years resolution is to use it only 30 minutes a day at max
miffel|2 years ago
MrGinkgo|2 years ago