Should children have mobile phones?

This is one of the questions parents ask me most. Sometimes they arrive anxious. Sometimes guilty. Sometimes with the specific version: “My child is obsessed with getting a phone and I genuinely don’t know what to do.” On one side, they see every other kid in class with a smartphone and their child feeling left out. On the other, they sense something could go wrong. Something vague, something they can’t quite put into words. Maybe development. Maybe sleep. Maybe that eye-contact connection that’s slowly becoming harder to get.

That worry isn’t groundless. But most of what parents read about kids and phones falls into one of 2 camps: phones are destroying childhood, or technology is the future and children need to embrace it. Both sides share one thing: neither actually refers to research. In this article, I want to do what a psychologist should do. Look at the evidence. See what the research actually says, not what parenting forums are arguing about. Then give you practical guidance you can use.

One thing before we begin: the answer isn’t the same for every child. Age matters, but it’s not the only factor. Moral development, the child’s temperament, how the phone is used, and how much parental oversight exists all play a role. This is what most articles ignore.

Why this question matters more than it used to

Ten years ago, this question came up far less. Now almost every family is wrestling with it. And it’s not just because phones got cheaper. A smartphone isn’t really a phone anymore. A landline in the 1990s did one thing: voice calls. A child who picked it up could speak to one person. That’s it. A smartphone today is something else entirely. Social media, games, video, shopping, communication with hundreds of people, and access to the entire internet, all in a device that fits in a pocket. That’s a qualitative shift, not a quantitative one.

When I say “phone,” I don’t mean a simple communication tool. I mean a portal to a world with no gatekeepers. A 10-year-old with a smartphone has access to the same content as any adult, if parents haven’t put controls in place.

The data is clear. The WHO recommends zero screen time for children under 2. For ages 2 to 5, no more than 1 hour per day. In December 2024, the Spanish Society of Paediatrics recommended that children under 6 have no screen exposure at all, citing documented negative effects on sleep, brain volume, cardiovascular health, and nutrition. In practice, many children well below these ages are spending hours a day on tablets and phones.

Why? Because it works in the short term. A child with a phone in their hand goes quiet. No crying. No questions. No demands. For an exhausted parent, that’s a fast fix. But fast fixes aren’t always the right ones.

There’s also a social dimension that can’t be dismissed. Peer pressure is real. A child in year 6 without a phone may genuinely feel excluded in certain social environments. That pressure shouldn’t drive the decision, but it should be acknowledged. Parents who respond only with “phones are bad” and nothing else tend not to get far.

What the research actually says

Research in this area isn’t all the same quality. Some studies are small. Some were conducted on specific populations. Some confuse correlation with causation. I’ll focus on findings with stronger foundations.

The effect of smartphones on children’s cognitive development

A child’s brain develops at an extraordinary rate in the early years. Neural pathways form, cognitive connections are built, and everything the child interacts with influences that process. The brain is learning how to learn. This is the most sensitive period for cognitive development.

A 2025 study published in Frontiers in Psychology found that smartphone use can either support learning or harm cognitive development, depending on how it’s used. Interactive educational content that requires thinking and responding can be genuinely useful. Passive consumption, sitting and watching endless videos with no active engagement, slows language development and attention capacity.

Research shows that children who spend long hours on non-interactive content have smaller vocabularies than their peers, more difficulty sustaining attention, and perform worse on tasks requiring patience and persistence. These differences are more pronounced at younger ages because the brain is more plastic and more sensitive during those years.

There’s another issue that gets less attention: external memory. When a child learns to Google everything rather than remember it, the habit of active memorisation gets less practice. Memory works like a muscle. Without use, it stays weak. Our generation knew dozens of phone numbers off by heart. Most people today can’t recall the numbers of their closest contacts without a phone. That shift isn’t trivial.

None of this means phones are inherently bad. How a phone is used matters more than the phone itself.

Mental health and social media

This is where the research gets more direct.

A study published in 2024 found that children who received a smartphone before age 13 were significantly more likely to experience anxiety, depression, and in more severe cases, thoughts of self-harm. The association was stronger in girls. A separate study found that 42% of boys who had access to a phone from age 6 reported higher stress levels compared to those who received their first phone at 18.

Several mechanisms explain why.

Social media is built on social comparison. A child whose identity is still forming sees dozens of images daily of lives that look better, more attractive, or happier. A child’s brain doesn’t yet have the capacity to process that volume of comparison. The result is a quiet, gradual sense of not being enough.

Then there’s cyberbullying. School bullying used to end when the child came home. Now it doesn’t end. The phone keeps it going around the clock.

And unfiltered content. A child with unrestricted internet access encounters material that isn’t age-appropriate: violence, sexual content, health misinformation, content promoting eating disorders, communities that normalise self-harm. These can shape a child’s view of the world before they’ve developed the analytical tools to evaluate any of it.

Sleep and physical health

One of the most well-documented and least taken seriously effects of smartphones on children is sleep disruption.

A 2025 study found that children who kept their phone in their bedroom slept an average of 45 minutes less than children who left their phone outside. The exact numbers: 8.6 hours versus 9.3 hours. Forty-five minutes may not sound like much. For a child in a growth phase, it is.

Blue light from screens suppresses melatonin production, the hormone that prepares the body for sleep. Using a phone before bed delays the time a child falls asleep, reduces total sleep, and lowers sleep quality. The consequences are direct: less focus at school, more irritability, a weaker immune system, slower physical development.

Poor sleep in childhood isn’t just tiredness. The brain consolidates the day’s learning during sleep. Disrupt that process and you disrupt learning alongside it.

The risks of smartphones in childhood

Dependency and reduced attention

Smartphone dependency in children isn’t the same as drug addiction, but the underlying mechanisms are similar. Every time a child picks up the phone and sees something engaging, dopamine is released. The brain learns to seek out that quick reward again and again. App designers know this. TikTok, YouTube, and mobile games are built to be endless by design. There’s no natural stopping point.

A child accustomed to instant rewards develops less tolerance for slow experiences. Reading, imaginative play, family conversation, problem-solving — these are all slower than scrolling. A brain trained on constant speed and variety finds those necessary activities dull. That’s why so many parents notice that after their child gets a phone, they stop reading or lose interest in things they used to enjoy. The change isn’t sudden. It’s gradual, and by the time it’s noticed, it’s already deep.

Research shows that children with high phone usage perform worse on tests requiring sustained attention. The gap is reversible with reduced use, but it takes time.

Physical inactivity and its effect on development

Children who spend hours on a phone move less. That sentence is simple. Its consequences aren’t.

Physical activity in childhood isn’t just about general health. It’s critical for brain development too. Movement, especially free physical play, creates new neural connections that no educational app can replicate. A child who runs, jumps, climbs, and plays ball is developing both body and brain at the same time.

The WHO recommends that children aged 6 to 17 get at least 60 minutes of moderate to vigorous physical activity per day. Studies consistently show that children with high screen time hit that target far less often.

There’s also the postural dimension. Prolonged sitting with the head bent towards a screen is producing musculoskeletal problems in children at rates not seen in previous generations. Back pain, neck pain, and vision problems are no longer conditions reserved for middle age.

Access to inappropriate content

The internet wasn’t designed for children. Most parents know this but underestimate the scale of it.

A 10-year-old with a smartphone and an internet connection can access adult content in seconds. Age filters are mostly decorative. A mildly curious child can work around them.

Inappropriate content isn’t limited to pornography. Graphic violence, extremist discourse, health misinformation, pro-eating-disorder content, communities that normalise self-harm — all of this is accessible to children who don’t yet have the capacity to evaluate or resist it.

There are also well-documented cases of online grooming: adults presenting themselves as peers, building relationships, establishing trust, then gradually steering children towards unsafe situations. This is a real risk, not an exaggerated one.

The effect on memory and learning

Working memory, the ability to hold information in mind and work with it, is one of the most important cognitive skills a person can develop. It needs practice. A child who learns to outsource everything to a device — saving numbers, photographing homework, Googling every question immediately — loses opportunities to build that capacity.

The practical consequence is that such a child becomes more vulnerable in situations without a phone. During an exam. Faced with a problem that needs solving. In a social situation requiring independent thought. Over time, that cognitive dependency also erodes the child’s confidence in their own mental capabilities.

The benefits of smartphones for children

I’m taking this section seriously, not as a gesture towards balance. Phones can genuinely be useful. The conditions matter.

Learning and educational content

Good educational apps exist. Duolingo for language, Khan Academy for maths and science, interactive music apps that teach children to read notation. These are serious tools that, used properly, can support learning.

The difference between educational content and passive entertainment is this: educational content keeps the child active. It asks questions, requires responses, tracks progress. The child is thinking, not just watching.

A 2025 study from the University of South Florida found that purposeful phone use, when guided by parents, can improve academic outcomes. The operative word is “purposeful.” A phone left on the table without structure drifts towards entertainment.

Connection with family

This is a practical benefit that can’t be dismissed. A child at school who needs to reach a parent quickly can. In a genuine emergency, a phone can be life-saving.

For children whose parents live in different cities, or whose grandparents are far away, video calls are a genuine gift. Those emotional connections matter.

Preparation for a digital world

The world these children are growing up into is digital. Being unfamiliar with technology will be a real disadvantage. Stopping a child from learning to drive because cars are dangerous doesn’t make much sense either.

Digital literacy, smart searching, evaluating information, using productivity tools, these are genuine skills children will need. Exposure to technology at an appropriate age, with proper guidance, is better than a child hitting adolescence with no foundation at all.

The distinction worth making is between “familiarity with technology” and “unrestricted access.” The first is the goal. The second is the risk.

What age should children have a mobile phone?

This is the central question of this article, and the precise answer depends on several factors. Before getting to specific ages, I want to explain one psychological framework that makes the decision more principled.

Kohlberg’s moral development theory and its relevance to phones

Lawrence Kohlberg, the American psychologist, proposed a theory of children’s moral development in the 1950s and 60s that remains one of the most reliable frameworks in this field. His core argument: moral development unfolds through distinct stages, each a prerequisite for the next.

In the first level, pre-conventional, the child makes decisions based on personal consequences. Something is wrong because it gets punished. Something is right because it gets rewarded. This level typically persists until around age 9.

In the second level, conventional, the child begins to understand social rules and group values. Good behaviour means behaviour others approve of. Rules exist because society made them. Children typically enter this level around ages 9 to 10, and most adults remain at this level throughout their lives.

Why does this matter for phones? A child still at the pre-conventional level has only 1 reason to follow rules: fear of being caught. The moment they think no one is watching, they’ll ignore the rule. A child who has entered the conventional level can follow rules because they understand why they exist, not just from fear. That’s a meaningful practical difference when you’re trying to set boundaries around phone use.

A child who hasn’t reached sufficient moral development won’t follow phone rules unless they’re under constant supervision. And constant supervision is neither realistic nor desirable.

Age-by-age guidance based on the evidence

Under 6

At this age, the answer is clear: no personal phone. The reason isn’t that technology is bad. A young child’s brain needs something else entirely. Free play, face-to-face interaction, exploring the physical environment, touching things, building things, running. These are the stimuli a developing brain actually needs.

The WHO explicitly recommends no screen time for children under 2. For ages 2 to 5, the ceiling is 1 hour per day with parental supervision. The Spanish Society of Paediatrics raised that boundary to age 6 in December 2024.

Occasional use of a parent’s phone for a video call with a grandparent, or 20 minutes of supervised educational content, isn’t especially harmful. But a personal phone at this age has no justification.

Ages 6 to 10

By this point the child is in school, their social world has expanded, and their curiosity about the world has grown. But they’re still in the early stages of moral development.

A personal phone with unrestricted internet isn’t recommended at this age. If there’s a genuine communication need, a basic phone without internet, or with tightly controlled internet, is sufficient. A shared family tablet with content filters and set usage times is a more reasonable option.

The priority in this period is helping the child become familiar with technology without becoming dependent on it. Learning to type, using educational apps, video calling relatives — all of this can happen with a shared device under supervision.

Ages 11 to 13

This is the most complicated period. The child is entering adolescence. Peer pressure intensifies. Developing some independence from parents is a normal part of growth at this stage. And in many social environments, not having a phone genuinely leads to social isolation.

A 2025 study from the University of South Florida found that giving children a phone from age 11, under appropriate conditions, is probably safe and can be useful. Take the word “probably” seriously. Conditions matter.

If you decide to give a phone at this age, several things need to be agreed upfront: usage hours, permitted apps, where the phone charges at night (not in the bedroom), and that parents have the right to review the phone at any time. These are agreements, not threats.

Age 13 and above

By this age, in terms of moral development, a child has typically reached the conventional level. They can follow rules because they understand the social reasoning behind them. Rudimentary critical thinking has formed. And the need for some degree of independence is genuine.

But 13 is a starting point, not the end of oversight. Handing a full smartphone to a 13-year-old with no rules is like giving them car keys and telling them to figure it out. Freedom should be gradual, growing as the child demonstrates responsibility.

Practical rules for parents

Knowing that phones can be harmful isn’t enough. The question is how to manage them so that a child isn’t cut off from technology, but technology doesn’t end up controlling the child.

How to set phone rules that actually work

Rules need to be negotiated, not dictated. A child who has some input in setting the rules is more likely to follow them. That doesn’t mean the child decides. It means you explain why the rules exist and involve them in how they’re implemented.

No phones in the bedroom at night. This is one of the most important rules you can set. The charging spot should be outside the bedroom. A 2025 study found that this single change can meaningfully improve a child’s sleep quality on its own.

Homework first, phone after. Simple and effective. The child knows the phone is available once schoolwork is done, not instead of it.

Set a specific daily limit. “Don’t use it too much” is vague and unenforceable. A specific amount of time per day, adjusted for age. For children aged 11 to 13, 1 to 2 hours per day outside of educational use is a reasonable starting point.

No phones at the dinner table. That means no phones for parents either. A rule that applies only to the child and not the adults at the table will not hold.

Parental controls

Parental controls aren’t a sign of distrust. They’re a sign of care. You wouldn’t let a 10-year-old go to a late-night concert alone. Unrestricted internet access belongs in the same category.

Most smartphones have built-in parental control tools. On iOS, Screen Time lets you limit usage hours, filter content, and control which apps can be installed. On Android, Family Link does the same. Introduce these tools at the outset as part of the phone agreement, not as a punishment added later.

Periodic review of the phone is also important, openly, not secretly. Tell your child from the start that you’ll do this. That transparency maintains trust while preserving the oversight that’s genuinely necessary.

Don’t overlook your own behaviour

Most articles on this topic skip this point. It may be the most important one.

Children watch more than they listen. If a parent is on their phone at dinner, checks it first thing in the morning, or answers messages mid-conversation, the child sees that. And the child learns that this is normal.

Rules that apply only to the child and not to the adults in the house don’t have solid foundations. The most effective thing you can do to manage your child’s phone use is to sort out your own relationship with yours.

Frequently asked questions (FAQ)