How often you check your phone matters more than how long you spend on it—and if you watch brain rot, you're burning yourself out

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We know, we know. We spend too much time on our phones, we’re too glued to our screens, etc. And yet, screen time, the number everyone tracks—yet few people actually change their behavior due to that number—may be measuring the wrong thing.

Two separate studies have now quantified how much time you spend on your phone matters a lot less than how you spend it. It’s the latest data point in how digital life is quietly reshaping the ordinary rhythms of American daily life, from where people spend their free time to how they spend the hours on their phone instead.