Privacy Policy for Mathack

Last Updated: February 13, 2026

Introduction

Mathack ("we", "our", or "the app") is committed to protecting your privacy. This Privacy Policy explains how we handle information in our math learning game application.

Information Collection and Use

Data We Collect Locally

Mathack stores the following data locally on your device only:

1. Game Statistics

  • Equation attempts and answers
  • Game session data (start time, end time, scores)
  • Daily summary statistics
  • Accuracy rates and performance metrics

2. Progress Data

  • Level completion status
  • Achievement unlocks
  • Current and best streaks
  • Operator preferences (addition, subtraction, multiplication, division)

3. User Preferences

  • Selected language (English, Finnish, or Swedish)
  • Theme settings (light/dark mode)
  • Game configuration options

Data Collected by Third-Party Services

Mathack displays advertisements through Google AdMob. AdMob may collect and process certain information, including:

1. Device Information

  • Device type and model
  • Operating system version
  • Unique device identifiers (Advertising ID)
  • IP address
  • Mobile network information

2. Usage Information

  • Ad interaction data (views, clicks)
  • App usage patterns
  • Approximate location (based on IP address)

3. Advertising Data

  • Ad preferences
  • Advertising ID for personalized ads

For more information about how Google collects and processes data, please review:

How We Use This Data

Locally stored data is used solely to:

  • Track your learning progress
  • Display your statistics and achievements
  • Provide personalized game difficulty
  • Remember your preferences between sessions
  • Enable you to continue where you left off

Data collected by AdMob is used to:

  • Display relevant advertisements
  • Measure ad performance
  • Provide personalized advertising experiences (if you haven't opted out)
  • Support the free version of the app

Data Storage

  • Game progress and statistics are stored locally on your device using Android's Room database and SharedPreferences
  • No game data is transmitted to external servers or third parties
  • AdMob may store data according to Google's privacy practices (cookies, device identifiers, etc.)
  • The app works offline - internet connection is only needed for displaying ads
  • No account creation required - no personal information is collected by us

Data Sharing

We do NOT:

  • Collect any personally identifiable information (PII) ourselves
  • Share your game progress or statistics with third parties
  • Transmit game data over the internet
  • Use analytics or tracking services for game behavior
  • Require account registration

However, Google AdMob may:

  • Collect device and advertising information as described above
  • Share data with Google's advertising partners
  • Use data for personalized advertising (you can opt out through your device settings)

Children's Privacy

Mathack is designed as an educational tool suitable for all ages, including children. We take children's privacy seriously:

  • We do not collect personal information from children ourselves
  • Game data remains on device - no transmission to our servers
  • AdMob compliance: Google AdMob is configured to comply with the Children's Online Privacy Protection Act (COPPA) and other applicable children's privacy laws
  • Ad settings: Ads shown in the app do not use personalized advertising for child-directed content
  • Parental controls: Parents can manage advertising preferences through their device settings

For more information about Google's approach to children's privacy:

Data Retention and Deletion

  • Data remains on your device until you uninstall the app
  • Uninstalling Mathack will permanently delete all locally stored data
  • You can clear app data manually through your device's Settings > Apps > Mathack > Storage > Clear Data

Permissions

Mathack requires the following Android permissions:

  1. Internet Access (INTERNET): Required to display advertisements through Google AdMob
  2. Network State (ACCESS_NETWORK_STATE): Used to check internet connectivity for ad loading
  3. Storage: Standard storage permissions to save your game progress locally on your device

All permissions are used solely for their stated purposes. We do not use these permissions to collect or transmit your personal game data.

Third-Party Services

Mathack integrates with the following third-party service:

Google AdMob

We use Google AdMob to display advertisements. AdMob is an advertising platform provided by Google LLC. When ads are displayed, AdMob may:

  • Collect device and usage information as described in the "Data Collected by Third-Party Services" section
  • Use cookies and similar technologies
  • Show personalized ads based on your interests (you can opt out in your device settings)

AdMob operates under Google's privacy policy. For detailed information:

Opting Out of Personalized Ads

You can opt out of personalized advertising by:

We do not integrate with any analytics platforms or other third-party tracking services.

Data Security

Your game data is protected by:

  • Android's built-in app sandboxing
  • Local-only storage (no network transmission of game data)
  • No cloud synchronization or external access to your progress

Advertising data collected by AdMob is subject to Google's security measures and practices.

Changes to This Privacy Policy

We may update this Privacy Policy from time to time. Any changes will be reflected in the "Last Updated" date at the top of this policy. Continued use of the app after changes constitutes acceptance of the updated policy.

Open Source

Mathack is an open-source project. You can review the source code to verify our privacy practices.

Contact Information

For questions or concerns about this Privacy Policy, please contact:

  • Email: joonas.jokivartio@jonski.fi
  • GitHub: https://github.com/jokijo

Your Rights

Since all game data is stored locally on your device:

  • You have full control over your game data
  • You can delete all data by clearing app data or uninstalling
  • You can export your data using the app's export feature (if available)
  • No game data is shared or accessible to us or third parties

For data collected by AdMob, please refer to Google's privacy controls and the opt-out options mentioned above.

Consent

By using Mathack, you consent to this Privacy Policy and agree to its terms.

Summary: Mathack is a privacy-focused educational app that stores all game data locally on your device. We do not collect, transmit, or share any personal information. Your game data never leaves your device. The app displays ads through Google AdMob, which may collect device and advertising information as described in this policy.