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Smartphones May Affect Sleep—but Not Because of Blue Light
(www.wired.com)
This is a most excellent place for technology news and articles.
I sometimes forget to turn on do not disturb so this has definitely happened to me before ¯\(ツ)/¯
Set a wake up alarm and your phone will automatically enter do not disturb mode for the 8 hours before your alarm
some people are teens and are in summer break (or have a worthwhile job that let's you clock in online and whenever you wake up).
And?
Sleep by Android and I'm sure some other apps turn it on for you when you plug it in at night, then turn it off when your alarm goes.
I'm pretty sure that forgetting and allowing are two very different things.