Kid Matix

Privacy policy — Kid Matix

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Last updated: 25 October 2026

Kid Matix is an app that helps children learn their multiplication tables by playing. It was made for children: it runs entirely on the phone or the tablet, with no account and no connection to the Internet.

In short

• No account, no email address, no password.
• No data leaves the device: the app never connects to the Internet.
• No advertising, no in-app purchase, no link to the outside.
• No analytics tool, no tracker, no third-party service.
• The game data is erased by deleting the player in the app or by uninstalling the app.

The data stored on the device

Several children can play on the same device, each with their own profile (10 profiles at most). For each profile, the app stores on the device only:

• the nickname chosen by the child (2 to 12 characters), the avatar and the colour chosen among those of the app;
• the progress: answers given, answer times, mastery of each multiplication, stars, crowns, experience points (XP), level, streak of days played, badges, records;
• the mascot: its name and the accessories it wears;
• the settings of the player: sounds, vibrations, timer, goal of the day, “Unlock everything”, reduced animations.

The app also remembers the last player chosen and the last choices made on the “Practice” screen, to offer them again the next time it opens.

The nickname is the only information entered by the child. We advise using a nickname rather than the real first and last name of the child.

This data serves the working of the game only: showing the progress, choosing the questions to review, awarding the rewards.

What the app does not do

• On the children’s side, it asks for one permission only, and only if the daily reminder is turned on in the settings: showing notifications. The reminder is scheduled on the phone, without a connection.
• In the teacher area only (protected by the teacher’s code), two permissions may be asked, at their first use and never on a child’s screen: the camera, to read the QR code of the results of another tablet of the class; the microphone, so that the teacher records their own explanation of a maths word. The camera image is neither saved nor sent; the recording stays on the device and only leaves it if the teacher exports it through the share sheet.
• It asks for neither Internet, nor location, nor contacts, nor photos.
• It sends no data, neither to us nor to anyone. We have access to no information about the players.
• It shows no advertising and offers no purchase.
• It uses no analytics, tracking or crash-reporting tool that talks to a server.
• It does not let the players exchange anything with each other, nor publish anything.

The sounds and the vibrations of the game are produced by the device, from files included in the app.

How long the data is kept, and how to erase it

The data stays on the device as long as the profile exists. To erase it:

• Delete a player: Profile tab, then Settings, section “This player”, “Delete this player”. To confirm, the nickname of the player has to be written again. All the data of this player is erased.
• Start over: in the same place, “Reset my progress” erases the progress of the player and keeps their profile, after the same confirmation.
• Erase everything: uninstalling the app deletes all the data of all the players.

As nothing is sent to a server, erased data cannot be recovered, and changing device starts from zero, except with a backup file (see below).

Backup to a file

In Settings, section “Backup”, an adult can export a profile to a file (nickname, avatar, settings, progress and mascot of this player) and share it themselves with the tools of the phone, for example to import it on another device; a parental check protects the export and the import. The app sends nothing: the file goes only where the user chooses to send it.

In class mode, the class files (the pupils’ nicknames and their results) leave the device only when the teacher shares them from the teacher area, which is protected by their code.

The automatic backup of the system (Google account or iCloud) is turned off for Kid Matix: the data of the game is not copied there.

Children

The app is meant for children from 6 years old. It collects no personal data and transmits nothing: it therefore follows the rules of Google Play for the apps made for families, those of the Kids category of the App Store, the GDPR and the United States COPPA law.

Changes

A future version could offer an optional online mode (leaderboards, backup to an account). In that case, this policy will be updated before its release, and the consent of a parent will be asked where the law requires it. As long as this page does not announce it, the app stays entirely offline.

Contact

For any question about this policy: saliouseck2009@gmail.com.

Publisher: Saliou Seck, Senegal.