Infinite Math Privacy Policy
This is the privacy policy for “Infinite Math: Brain Puzzles” (Japanese name: 無限数学; the “App”). The App is provided free of charge by Touzanbou (Kenta Yamamoto) for iPhone and Android. By using the App, you are deemed to have agreed to the handling of information described in this policy.
Information We Collect
No account registration is required. The problems you have solved, your progress, and your settings are stored only on your device and are never collected by Touzanbou.
Advertising
To keep the App free, it displays banner ads from Google AdMob. To show ads and measure their performance, AdMob may collect the advertising identifier (IDFA / Advertising ID), IP address, and information about your device and the App.
On iPhone, the App may ask for permission to track for ad optimization. You can use every part of the App without allowing it, and you can change this later under Settings > Privacy & Security > Tracking on your device.
In some regions, the App first asks for your consent regarding ads. You can change your choice at any time under “Ad privacy settings” in the App's settings.
For how Google handles this data, see Google's Privacy Policy (https://policies.google.com/privacy) and how Google uses information from ads (https://policies.google.com/technologies/ads).
Crash Information
On iPhone, if an error occurs, diagnostic information such as your device type, OS version, and the circumstances at the time of the error may be sent to Apple through Apple's mechanisms, only if you have allowed it in your device settings.
On Android, the App uses Google's Firebase Crashlytics to fix problems. When the App crashes, it sends the circumstances (such as the stack trace, device model, and OS and app versions) along with an app instance identifier. You can turn this off at any time in the App's settings.
Contact Form
Only when you send a message from the App's settings, the message you enter, your email address (optional), and the technical information needed to investigate an issue (such as OS and app versions) are sent to the developer. This happens only when you choose to send, and nothing is collected automatically.
Security
While we strive to protect your information, no method of transmission over the internet or electronic storage is 100% secure, and we cannot guarantee its absolute security.
Links to Other Sites
Ads and other parts of the App may take you to other sites. Those sites are not operated by Touzanbou, so please review their privacy policies.
Children's Privacy
Touzanbou does not knowingly collect personally identifiable information from children under 13. If you are a parent or guardian and believe your child has sent us personal information, please contact us.
Changes to This Privacy Policy
This policy may be updated from time to time. If changes are made, we will notify you by posting them on this page. We recommend that you review this page periodically.
Contact
If you have any questions or suggestions about this Privacy Policy, please reach out through our contact page.
Effective as of May 25, 2026; revised October 28, 2026 (rewritten to match how the App actually works).