How much of your life will you spend looking at a screen?

Dino Ambrosi cites a 2021 report he describes as the most in-depth research available on US youth screen time, which found the average 13-to-18-year-old spending 8 hours and 39 minutes per day on non-productive online entertainment across all devices. He stresses what that excludes: using a laptop for school, Google Maps, texting and phone calls. It counts social media entertainment and video games. It is also an average, so roughly half of teenagers are above it — he says he has personally seen screen time reports as high as 16 hours a day from enrolled UC Berkeley students mid-semester.

It is the visual Ambrosi shows in school assemblies. Starting from an 18-year-old with a life expectancy of 90, he subtracts about a third of the time for sleep, about 126 months of work if they work to 65, and Bureau of Labor Statistics estimates for driving, cooking, eating, chores, errands and hygiene. That leaves a rough estimate of 334 months of free time, and at 8 hours 39 minutes a day, 312 of those months go to non-productive screen time — about 93%. He adds the caveat himself: the categories may overlap and that is hard to quantify, so maybe the real free-time figure is closer to 345 months. He also insists it is what people are on pace for, not what they will actually spend.

Ambrosi says no, and it is the first thing he wants students to sit with. The apps do not charge money because, in his words, we are not their customer, we are their product — they make money giving advertisers access to our time and attention. So the price is time. He is not arguing for quitting: he still uses Instagram and YouTube daily and calls them net positive things in his life. His ask is only that you know what you are paying and what you are getting.

Ambrosi's objection is that a streak quantifies the strength of a friendship using completely the wrong data — daily back-and-forth, even when the snap is a photo of a wall or a ceiling. Kids then read their streaks as a measure of their social life, which is why losing one is devastating and why friends log in for each other during vacations. He points to Snapchat letting users pay to reactivate a lost streak, a Snapchat Premium feature he says apparently now lets people pay to see who someone's best friends are, and being able to see that a snap was delivered and deliberately not opened. He calls the result addictive entertainment masquerading as social media.

Ambrosi thinks phone pouches and bans make sense for K-8 but not for older high school students, and he says he slightly disagrees with Jonathan Haidt about phone-free schools for the last two years of high school. His reason is that the strongest factor driving online behavior is the cultural norm inside the student body, and that change has to come from the students. A top-down ban can even make it worse by turning phones into forbidden fruit — he notes that at some schools rolling out pouches, students have started selling magnets to unlock them for profit on campus.

Nick raises Haidt's figure that suicide among US adolescents aged 10 to 14 rose 121% between 2010 and 2020, and notes the causation has not necessarily been proven even though the correlation is strong. Ambrosi does not claim it. He says he is not a mental health expert by any means, calls it a very multivariate issue, and lists several things he thinks are in play: escapism as a coping mechanism, social comparison, cyberbullying, and lost sleep. He mentions talking to teens staying up until 4 a.m. on TikTok and getting four hours of sleep, and says it is no wonder kids feel extremely anxious when their biological needs are not being met.

Ambrosi says yes, and cites a study out of UT Austin, describing the finding as that you are measurably more intelligent when you are physically separated from your phone. He gives no figure beyond that. He uses it to argue for studying with the phone in another room rather than face down on the desk, and pairs it with moving the phone charger out of the bedroom as the two easiest wins available.

Ambrosi's advice is to go after the trigger rather than rely on willpower. Notice the moment you reach for the phone, because it is usually an unconscious response to stress, boredom or anxiousness rather than a decision. Then pick a break that is satisfying instead of merely pleasant — he says bingeing short videos leaves you feeling like you have taken an anti-nap. Tools that add friction help, and so does an accountability buddy. He is also firm that you should not blame yourself for it, and that tracking your screen time gives you proof you have turned it around before.