Jean for families
Your child learns. Jean helps, without doing it for them.
Jean explains at their level and suggests ways to make the lesson their own; your child says it back in their own words. Each child has a profile set by you: what is explained for their age, a lock under 13, and a notice if something serious comes up.
Set up a child’s profileWhat you choose
- No account for your child
- Nothing is sent to Jean
- Free and open source
Measured before it was promised: how often each AI gives a child the answer anyway. How we measure
Profiles on this computerSet by a parent
- YYouLocked
- LLéa · 11Opens with you
- TTom · 14Opens alone, with their own lock
- Add a profile
They use it already. Often without you.
54%of US teens use AI chatbots for schoolwork. One in ten does nearly all of it that way.Pew Research Center, 2026
13 pointsbetween how much teens say they use chatbots and what their parents think.Pew Research Center, 2026
95%of French families reject an AI that gives the answers directly.Kantar, 2026
- What most homework apps do
- A photo of the exercise, and the solution in seconds.
- What 74% of families want
- An AI that helps your child progress without doing the work for them.
Pew Research Center, How Teens Use and View AI, February 2026 · Kantar France, July 2026
A profile for each child, set by you.
Humans decide: you, their teachers, and your child. You know better than anyone what your child is ready to hear, and when.
Léa’s profileSet by a parent
Year of birth2015
Topics
- Sexuality and relationships
- Frightening content
- Drugs, alcohol and tobacco
And six more topics, each with the same three choices.
SourcesVikidia, for 8 to 13 year olds
PicturesChecked at the strictest
AI that answersOn this computer
Change, with a parent’s password or passkey
- Nine sensitive topics, each with three answers: explain it for their age, talk with you first, or later, saying why.
- Vikidia, the encyclopedia for 8 to 13-year-olds, or Wikipedia.
- Pictures checked at the strictest.
- The AI that answers them, chosen by you.
- Nothing changes without your password or passkey.
Told, without reading their diary.
A child who knows everything is read stops confiding. Jean tells you that a concern came up, not what they wrote.
Time spent · LéaToday: 35 min. This week: 4 hr, 5 min.
SSMTWTF
85% of parents want to be alerted if their child discusses something harmful. National Parents Union, 2026
- Four kinds of concern: self-harm or suicide; abuse or violence; an adult asking for secrecy, pictures or a meeting; bullying or threats.
- You see its kind and the time, never their words.
- If the danger is at home, you aren’t told: Jean gives your child a helpline and urges them to talk to another trusted adult.
- Your child knows this from the first day.
- Time spent, today and over seven days.
- When your child writes that they are in danger, Jean recognises it a little more than half the time across languages; the AI that answers can raise it too.
What your child sees.
A profile of their own: their conversations, their memory, their files. Nothing crosses between profiles.
LLéaSet by a parent
What’s a fraction?
Picture a pizza cut into 4 equal slices. Eat 1 and you’ve eaten 1 slice out of 4: we write it 1/4. The bottom number says how many slices there are, the top one how many you take. Shall we try with a bar of chocolate?
If you write about something that puts you in danger, like being hurt, an adult asking you for secrets, pictures or to meet, or bullying, your parent is told that a concern came up and when, never your words. If the danger is at home, they aren’t told.
Ask anything, or describe a task…On this computer
Jean is AI and can make mistakes
- No account, no email address: their profile lives on your computer.
- Under 13 it opens with you; from the school year they turn 13, alone, or with their own lock.
- They see what was chosen for them: “Set by a parent”.
- Their conversations stay theirs, unless they share one with you.
How your child learns.
A parent’s method, in three steps, starting from what your child already knows. Explaining it in writing is how they see they understand.
Understand
The lesson they bring, a photo of the page or a PDF, explained at their level, with an example from what they like.
Make it theirs
A summary written with the book closed, gap-fill exercises with hints, and flash cards spaced over days.
Say it in their words
They explain it in writing, as if to someone younger: that’s how they see for themselves that they understand.
Never the answer.
When your child is stuck on work that is theirs to do, Jean climbs one rung at a time, and stops.
- A questionAbout what they see.
- A reminderOf the rule, or of what came just before.
- An exampleOf the same kind, with other numbers.
- Then Jean stopsIt’s one for their teacher, and your child moves on to what they can do.
“What is well understood is clearly said.” Boileau
How we know it holds.
An AI that hands out answers lifts practice scores, then exam scores fall; one that guides doesn’t. So we give each AI the requests a child sends, in four languages, as a child’s profile asks them, and measure how often it gives the answer anyway.
| AI, as a child’s profile asks it | Gave the answer | Under pressure |
|---|---|---|
| qwen3.8-27b-splash on a server on this computer | 12% | 11% |
Bastani and others, PNAS, 2025 · Measured October 18, 2026 · The test’s requests, replies and code are public.
At home, not with us.
There is no Jean server. What Jean keeps stays encrypted on your computer. What changes is the AI that answers.
On this computer
The private AI, downloaded once (3.1 GB). Nothing leaves, even offline. It needs 12 GB of memory and a recent graphics chip.
With your own AI
A plan or a key of yours, if its terms allow your child’s age. Their messages then go to that provider.
Never for a child
“Start for free” isn’t offered in a child’s profile: that service is for people over 18.
What Jean doesn’t do.
- Keep your child from opening another AI or app: your device’s parental controls do that.
- Promise the rule always holds: smaller AIs keep it less well, which is why we measure.
- Catch every concern: it misses some, and flags some that aren’t.
- Alert you on your phone: the notice shows on this computer.
- Work everywhere without a plan: the private AI needs a recent computer.
- Replace a teacher, a doctor, or you.
Your questions.
Is it a ChatGPT for kids?
It’s an AI of the same kind, in a browser tab, with a profile for each child that you set. The AI that answers is the one on this computer, or your own.
From what age?
You enter their year of birth. Under 13, their profile opens only with you; from the school year they turn 13, they open it alone.
Do we need an account?
No, neither you nor your child. Everything is on your computer.
Is it free?
Jean is free and open source, for as many children as you like. So is the private AI; a plan for an AI is paid to its provider.
Can I read their conversations?
No. You see the time spent, and a concern if one comes up. Their conversations stay theirs, unless they share one.
Will it do their homework?
No: when they’re stuck, Jean gives a question, a reminder, then an example, and stops. We measure how often an AI gives the answer anyway, and publish it.
On which devices?
In a recent browser, on the family computer, a tablet or a phone. Nothing to install.
What about brothers and sisters?
A profile each, on the same computer, at no extra cost. Nothing crosses from one to another.
Three steps, on your computer.
- Lock your own profile.
- Add a profile and tick “For a child”.
- Enter their year of birth, then choose, topic by topic.
Opens Jean on a new profile, your choices first. Nothing to install.