Privacy Policy

Last updated: May 1, 2026

This Privacy Policy explains how Math Duel - Brain Battle ("Math Duel", "the app", "we", "us", or "our") handles information when you use the app.

Math Duel is designed as a local math game. We do not require an account, and we do not operate our own user database or analytics server.

Information Stored on Your Device

Math Duel stores gameplay preferences and progress locally on your device so the app can work correctly. This may include:

Player names entered in the app.
Game settings such as difficulty, round count, timer duration, sound, haptics, and selected theme.
Gameplay statistics such as games played, wins, draws, best streaks, fastest answers, and difficulty usage.
Unlocked themes, unlocked difficulties, rewarded ad counters, purchase unlock state, and custom equation settings.

This information is stored locally using device storage. We do not collect it on our own servers. You can reset gameplay statistics in the app settings, and you can remove locally stored app data by deleting the app from your device.

Advertising

Math Duel uses Google AdMob to show ads, including interstitial and rewarded ads. Google and its partners may collect or receive information from your device to provide ads, measure ad performance, prevent fraud, and comply with their policies. This may include device identifiers, advertising identifiers where available, approximate location, ad interactions, diagnostics, and usage information related to ads.

Google may use this information for personalized or non-personalized advertising depending on your device settings, consent choices, and applicable law. You can learn more about how Google uses data at https://policies.google.com/technologies/ads and about Google AdMob at https://support.google.com/admob.

In-App Purchases

Math Duel offers optional in-app purchases, such as Pro features and theme packs. Purchases are processed by the app store provider for your device, such as Apple App Store or Google Play. We do not receive your full payment card details. The app may store purchase status locally so purchased content remains unlocked.

Sharing Features

Math Duel may let you share app links or result cards using the sharing tools provided by your device. Sharing is optional. When you choose to share, the information is handled by the apps or services you select in the system share sheet, and their privacy policies apply.

External Links

The app may open external links, such as an app store page. We are not responsible for the privacy practices of external websites or services.

Analytics

Math Duel does not currently use a third-party analytics service to collect app usage analytics for us. If analytics are added in the future, this Privacy Policy will be updated before that change is released.

Children's Privacy

Math Duel does not require users to create an account and does not ask users to provide contact information. We do not knowingly collect personal information from children on our own servers. If you believe a child has provided personal information through the app, please contact us so we can review the issue.

Data Retention

Locally stored game settings, progress, and purchase unlock state remain on your device until you reset them where the app provides that option, clear app data, or delete the app. Information handled by third-party services, such as advertising networks or app store providers, is retained according to those services' own policies.

Your Choices

You can control some data use through your device and app settings:

Reset gameplay statistics in the app settings.
Delete the app to remove locally stored app data from your device.
Use device privacy settings to limit ad tracking or advertising personalization where available.
Manage purchases, refunds, and subscriptions through your app store account settings.

Security

We use platform-provided storage and app store purchase systems. No method of storage or transmission is completely secure, but we limit the information we handle directly by keeping gameplay data local where possible.

Changes to This Policy

We may update this Privacy Policy from time to time. If we make material changes, we will update the "Last updated" date above and make the new version available at this page.

Contact Us

If you have questions about this Privacy Policy, contact us at: seif.ibrahim@iseif.dev