The average person spends a little over 76,500 hours — or 8.74 years — on a smartphone during their life, according to a 2020 survey by tech website WhistleOut.

Millennials (born 1981 to 1996) spend an average of about 3.7 hours per day on their phones. Not including the average sleep time for adults — around nine hours — this means they spend almost a quarter of their lives looking at their phones.

Generation Xers (1965 to 1980) spend an average of about three hours per day on their phones — 16.5% of their waking lives. Baby boomers (1946 to 1965) spend the least amount of time on their phones, with an average of 2.5 hours per day, or about 9.9% of their waking lives.

However, members of Generation Z (born after 1996), who weren't included in the survey, seem to spend even more time on their phones than Millennials. Ninety-five percent of teenagers aged 13 to 17 say they have a smartphone or access to one, and 45% say they are online all the time, according to a 2018 Pew Research study.

Another 2018 Pew Research study found that 54% of US teenagers say they spend too much time on their phones, and 52% have tried to reduce mobile phone use.

Too much screen time has been linked to a number of health risks. In a study of more than 3,800 teenagers, researchers found a link between social media and television use with symptoms of depression, according to JAMA Pediatrics.

Increased screen time has also been linked with a higher risk of obesity and diabetes.

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