Privacy Policy

Last updated: 13 August 2026.

Dad4Kids is a site of educational math games for children. This page is written for parents in plain words: what we store, why we store it, how long we keep it, and how to have it deleted.

The short version

We store exactly two things: a grown-up's email address, if they create an account, and learning progress — which math steps have been mastered, how many problems were solved, and how quickly the child answers. That's all.

We never ask for a child's name, age, or gender. We don't ask for photos, don't look up your location, and don't collect phone numbers or addresses. There are no ads on the site, and we don't share or sell data to anyone.

Who we are

Dad4Kids is a personal project. There's no company behind it, no office, no support department — a father builds these games for his own kids and publishes them free for everyone else. So the only way to reach us is email: hello@dad4kids.com. Write to us; a real person answers.

What we store

A grown-up's email address. Only if you create an account. It lets you sign in and recover access if you forget your password. We don't use it for anything else — we don't run a mailing list.

Your password, but not the password itself. The database holds a one-way fingerprint of it. The original password cannot be read back from it, not even by us.

The learning log. Which math steps have been mastered, how many problems were attempted and answered correctly, and the answering pace. The game uses that pace to pick the right difficulty — which is exactly why we don't need to know the child's age.

What we don't store

No child's first or last name, age, gender, or date of birth. No photos. No address, phone number, or location. No contact details for the child at all — no email, no messaging handles. No payment details: there's nothing to pay for.

The child never types anything about themselves. In the games they only solve problems. The account belongs to a grown-up, and we explain that on a separate short page: our policy on children.

Playing without an account

You can start playing right away, with no sign-up — we offer an account, we don't insist on one. In that case progress is kept by the browser on the device itself and never reaches us. There's a catch: a browser may clear its own storage (Safari on iPad does this if the site hasn't been visited for about a week), and the progress is gone. That's the whole reason the account exists.

One honest detail: some games also keep a backup copy of progress on our server under a random device number. That copy holds no email and no name — just the progress — and we have no way to connect it to a person.

Why we need this

So a child's months of work don't disappear with a cleared browser or a lost tablet. So lessons continue from the same place on another device. So the game can match the difficulty to the child. So you can sign in and reset a forgotten password. There is no other use.

Signing in with Google

We may add Google sign-in later, so you don't have to invent another password. If we do, Google will give us only your email address and nothing else — no name, no profile picture, no contact list. For now this option is switched off.

Cookies

We use cookies for two things only: keeping you signed in and remembering your language. We have no advertising or tracking cookies. Details are on the cookies page.

Who we share data with

Nobody. We don't sell or hand data to advertisers, data brokers, or analytics companies. There are no ad trackers or social-network pixels on our pages.

The site runs on a rented server, so physically the data sits with a hosting provider — as it does for every website on the internet. Nobody else sees it.

Server records

Like any web server, ours keeps technical records of requests to the site. We don't build profiles from them and don't tie them to your account.

We also count how many times each game is started, so we know which games are actually wanted. That count stores no IP address and no account — only an unreadable fingerprint that changes every day. You can opt your own device out of the count by opening this link.

How long we keep it

For as long as the account exists. Delete the account and the learning log goes with it — no "archive copies just in case". Progress stored in the browser on a device lasts exactly as long as the browser keeps it.

Seeing, correcting, or deleting your data

Write to hello@dad4kids.com from the address the account was created with and tell us what you want: to see everything we hold, to correct it, or to delete all of it. Deletion removes both the email address and the learning log. We won't try to talk you out of it and won't ask why.

Progress saved in the browser without an account is yours to delete: clear the site data in your browser settings.

If this policy changes

We'll update the text and the date at the top of this page. If the change is significant — meaning we start storing something new — we'll email everyone who has an account.

Contact

Any question about data goes to hello@dad4kids.com.