Privacy Policy

Last updated: October 14, 2026

Math Bonk! (mathbonk.com) is a free math game for kids ages 5–8. We built it to collect as little as possible. This page explains what we collect, why, and how parents can have it deleted. It's written for parents; kids, please ask a grown-up to read it with you.

No accounts, no personal information

Math Bonk! has no sign-up, no email addresses, no passwords, no chat and no way for players to contact each other. We do not ask for a child's full name, address, phone number, photo, voice or location.

What the game stores

Player nickname, color and avatar, chosen on the player screen. Please use a nickname or first name only, never a full name.
Game progress: monsters caught, skill levels, recent answers, outfits and settings.
Family code: a random phrase (like "red fox blue owl") that groups a household's players.

This is saved in your browser's local storage and, so progress can follow you to other devices, on our own server, filed under the family code. We use it only to run the game. We don't sell it, share it, or use it for advertising.

Analytics

We run our own copy of Umami analytics at analytics.mathbonk.com to count which screens get played. It sets no cookies, stores no IP addresses, and keeps no information that identifies a person. It records things like the screen viewed, browser type, device type and country.

Advertising

Some screens show one banner ad from Google AdSense, a third-party vendor. Ads are never shown on the title screen, the player screen, or during a battle.

Every ad request is tagged for child-directed treatment (Google's "tag for age treatment"), and ads are requested as non-personalized.
This means Google turns off interest-based ads and remarketing, blocks requests to third-party ad vendors, and applies its ad protections for children. Ads are chosen from the page's content, not from a child's browsing history.
Google may still use cookies or similar technology to deliver ads, limit how often an ad repeats, and prevent fraud. See how Google uses information from sites that use its services and how Google uses cookies in advertising.

Visitors in the EEA, UK and Switzerland may see a consent message from Google before ads load.

Children's privacy (COPPA)

Math Bonk! is directed to children under 13. We do not knowingly collect personal information from children as defined by the U.S. Children's Online Privacy Protection Act (COPPA) or GDPR. The nickname field is limited to 12 characters and is only shown inside the game. If you believe your child entered personal information, contact us and we'll delete it.

Parents' choices: review and delete

Delete a player: tap ✕ next to the player on the player screen. This removes them from this device and from our server.
Delete local data: clear this site's data in your browser settings.
Ask us: email [email protected] with your family code and we'll show you or delete everything stored under it.

Security and retention

The server only accepts game data in the expected shape and size. Saved data is kept until it's deleted as described above.

Changes

If we change this policy, we'll update the date at the top. If a change means collecting anything new from kids, we'll ask for a parent's consent first.

Contact

Questions about privacy: [email protected]