Lucas, 28, a prisoner of the scroll
Today, I want to tell you the story of Lucas. Lucas is 28, a strategy consultant at a large Paris agency, the kind of dynamic young professional who juggles meetings, PowerPoint presentations and after-work drinks. On paper, everything was fine: a flat in the 11th arrondissement, a comfortable salary, friends, plenty of plans.
Except there was a problem, a problem many of you know well because it is a little bit yours too: Lucas could no longer put down his phone.
Four hours and forty-five minutes a day on average according to his Screen Time, almost half of it on Instagram, TikTok and LinkedIn, scrolling with no purpose. Compulsive scrolling had become his default reflex: on the metro, between two tasks, in bed before sleep, when waking up, sometimes even on the toilet for 25 minutes without noticing. The worst part is that he blamed himself every time.
Trying everything without ever replacing the habit
Lucas had tried everything to stop this scrolling addiction. He had deleted Instagram three times, only to reinstall it three days later "just to check something". He had bought a Kindle that had been gathering dust on his nightstand for two years. He had downloaded six meditation apps, none of which made it past the second guided session.
He had even tried leaving his smartphone out of the bedroom at night for exactly twelve days, before caving because he used it as an alarm clock.
The problem, as Cal Newport explains in Digital Minimalism and Nir Eyal in Indistractable, is that you do not delete a habit, you replace it. And Lucas had never found what to replace those 20, 30, sometimes 60 daily minutes of mechanical scrolling with. Cutting without a substitute leaves a void the brain will fill with something else: snacking, impulse buying, another app. Willpower alone never holds for long against that void.
The encounter with Cobalt on the metro
Everything shifted one Saturday morning in January, on the metro between Republique and Sentier. A friend handed him her phone and showed him an app she had been using for three months: Cobalt. "They are book summaries, she explained. You read or listen to the essence of a book in 10 minutes, and you get the main ideas, the striking examples, the concepts worth remembering." Lucas was skeptical at first.
He had already heard of this kind of app, but they were either not available in his language, or full of aggressive notifications, or riddled with ads.
Cobalt was different: an app with over 500 non-fiction book summaries in English, covering personal development, business, philosophy, psychology, science and spirituality, a clean design that looked more like a meditation app than a social feed, and above all, a free 7-day trial with no commitment. He downloaded the app from the App Store that very evening.
For the first two weeks, Lucas simply swapped his scrolling sessions for Cobalt sessions, mechanically. In the morning on the metro, instead of Instagram, the summary of Atomic Habits by James Clear (12 minutes, listened to while walking to the office). At lunch, instead of TikTok, the summary of Sapiens by Yuval Noah Harari. Before sleep, instead of LinkedIn, the summary of The Subtle Art of Not Giving a F*ck by Mark Manson.
What he noticed in the very first week is that he closed the app after the summary.
No more infinite feed, no more autoplay videos chaining one after another, no more notifications pulling him back. One session, one idea, done. This finitude changes everything: unlike platforms designed to keep you hooked, Cobalt is built to let you go.
After three weeks, his average Screen Time had dropped from 4h45 to 2h50 a day, with no particular effort of will, simply because his fingers now found Cobalt on the home screen instead of Instagram.
Results far beyond screen time
But the real change was not in the Screen Time numbers. Three months later, Lucas had listened to 47 summaries. He had bought 6 books in full, the ones that truly spoke to him, and read them properly. In meetings, he spontaneously quoted Daniel Kahneman on cognitive biases, Cal Newport on deep work, Brene Brown on managerial vulnerability, Viktor Frankl on the search for meaning.
His colleagues asked how he managed to have "read so much", and he answered honestly: "I have not read that much, I mostly stopped scrolling".
His sleep had improved (a well-documented effect of reducing screen time before bed), his focus at work too, and his overall mood as well. And he had gained, roughly, two hours a day. Two hours a day, over a year, adds up to 730 hours, almost a full month of extra conscious life. Once you do that cold calculation, it is hard to keep giving those hours to TikTok.
Why Cobalt works where everything else failed
Why does Cobalt work where thirty other productivity apps failed for Lucas? The answer comes down to three words: intention, finitude, pleasure. Intention: you do not open Cobalt "to kill time", you open it to learn something specific. Finitude: a summary lasts 5 to 12 minutes, and the app does not autoplay the next one, the session ends when you decide.
Pleasure: the summaries are written by real authors, with a voice, concrete examples, reasoning that unfolds, instead of shock phrases ripped from their context.
You will find audio summaries narrated in a human voice for your commutes, annotated texts for focused reading, key concepts extracted for quick review, and the ability to save your favorites to return to. Cobalt covers over 500 essential books, from Sapiens to Atomic Habits, from The Power of Now to Think and Grow Rich, from The 7 Habits of Highly Effective People to the Enchiridion of Epictetus and The Art of War.
The app is available in French, English, Spanish, German and Italian, on iOS and Android, with a free 7-day trial and no credit card required.
What Lucas's story tells all of us
Lucas's story is not exceptional, and that is precisely why it deserves to be told. According to DataReportal 2025, the average person spends 4h37 a day on their phone, and 78% of those minutes are scrolling with no conscious intention. This is not a personal weakness, it is the result of a decade of product design explicitly built to exploit your reward circuits, as Johann Hari documented in Stolen Focus.
But what neuropsychology also teaches us is that these same circuits can be reconfigured in a few weeks, provided you offer them a replacement behavior that combines micro-reward, low friction and meaning.
That is exactly what an app like Cobalt offers: 5 to 12 minutes to grasp a big idea, in the very format where you were already consuming (your phone), with no guilt and no painful wrenching away.
Whether you are a manager, a student, a parent, a freelancer, an entrepreneur or retired, the math is the same: 20 minutes of daily scrolling is more than 120 hours lost a year; 20 minutes of Cobalt a day is the equivalent of 50 to 60 books covered in a year and a general knowledge that holds its own in conversation, in meetings and at dinner.
Lucas has not become a digital monk. He still has a phone, he still watches TikTok sometimes on a Sunday evening, and he does not claim to have fixed his relationship with screens once and for all. But he has reversed a balance of power: his phone has become a tool serving what he wants to become, instead of a pit of wasted time.
If part of this story speaks to you, if you recognize the automatic unlocking, the hours evaporated on Instagram, the frustration of not having read the 30 books you had planned this year, then give Cobalt a try.
The trial is free for 7 days, with no credit card required, on iOS and Android. At worst, in a week, you uninstall the app and you have lost nothing. At best, like Lucas, you will have turned a destructive reflex into a constructive habit, and reconfigured your relationship with time. The only question left is: how many Lucases are still asleep inside you, and what are you waiting for to wake them?