Privacy Policy

Last updated: November 4, 2026

In short

Bubble Math is a free times tables game for children. It needs no account, shows no ads and collects no personal data. The browser version is free and will always stay free. The mobile apps have a free daily round limit and an optional subscription. We do not sell or share data, because we do not have any.

What is stored

So the game can remember progress, your device (the app’s or the browser’s storage) keeps: which multiplication facts were practised, the results and answer times, the difficulty level and the prizes earned. This data stays on the device and is not sent to any server. Clearing the app’s or browser’s data deletes the progress.

Children

The game is designed for children aged about 6–10. We never ask children for a name, email address, photos, location or any other data. There is no chat and there are no ads. The only purchase (the subscription in the mobile apps) sits behind a parental gate and can only be confirmed by an adult.

App permissions

The Android app needs no special permissions: it does not use the microphone, camera, location or contacts. It only plays short sound effects.

Website

The site timestables.inudev.org is hosted on Cloudflare Pages. Like any web server, Cloudflare processes technical request data (such as the IP address) to deliver the site and protect it from abuse. We use no cookies, analytics or advertising tools.

Subscription and third-party services

In the mobile apps the subscription is bought through Google Play or the App Store; payment and payment details are handled only by the store and we cannot see them. The subscription status is checked by RevenueCat (RevenueCat, Inc.), which processes the purchase information and an anonymous installation identifier – no name, email address or other personal data. The game contains no advertising, analytics or social libraries. The internet is only needed to buy or restore a subscription, not to play.

Your rights

We do not keep personal data on our own servers. The purchase record and anonymous installation identifier are held by RevenueCat; you can ask for them to be deleted by writing to [email protected]. You can erase your game progress at any time by clearing the app’s or browser’s data.

Changes to this policy

If we ever change how data is handled, we will update this page and the date above, and tell users in the app if the change affects children.

Contact

Privacy questions: [email protected].