Privacy Policy

This Privacy Policy describes how Heidelberg Catechism — Learn, Memorize & Grow in Faith (the "App") is operated by Q.Z.L Corp. ("we", "our", or "us") and explains how information is collected, used, and disclosed when you use the App.

1. Information We Collect

The App does not directly collect, store, or require users to provide personally identifiable information such as:

• Name or email address
• Phone number
• Precise location or GPS data
• Contacts, calendar, or media files

The App operates as a standalone application without requiring user authentication or account creation. Your study progress and preferences are stored locally on your device, not on our servers.

2. Third-Party Services

The App uses third-party services that may collect information in accordance with their own privacy policies:

Google AdMob (Advertising)

The App displays advertisements provided by Google AdMob. AdMob may collect and use the following information:

• Device information (manufacturer, model, OS version)
• Advertising ID (unique identifier for ad targeting)
• Approximate location (country/region level)
• App usage and interaction data
• Unique device identifiers

This information is used to provide, personalize, and improve advertising services. For more information about Google's data practices, visit: https://policies.google.com/privacy

Google AI (AI Tutor Feature)

The AI Tutor feature uses Google AI to answer your questions about the Heidelberg Catechism. When you use this feature:

• Your questions are sent to Google AI services
• Google may process and analyze your questions to provide responses
• Conversation data may be used to improve AI services
• Google's privacy policy applies to this data processing

For more information about Google AI's data practices, visit: https://ai.google.dev/privacy

Text-to-Speech Services

The App includes text-to-speech functionality to read questions and answers aloud. This feature may use:

• Device-native text-to-speech engines
• Third-party speech synthesis services (if available in your region)

Speech data is processed on your device or through secure third-party services and is not stored for advertising purposes.

3. Advertising

The free version of Heidelberg Catechism displays advertisements via Google AdMob. These ads may be:

• Personalized based on your anonymous device identifiers
• Contextual (based on app content)
• From various advertisers using AdMob's network

Ad revenue helps us maintain and improve the App. If you prefer an ad-free experience, consider upgrading to the paid version.

4. Data Security

We prioritize your privacy and security:

• Most data is stored locally on your device
• Data transmitted to third-party services (e.g., AI Tutor) uses secure encryption
• We do not store or sell your personal information
• Keep your device and app updated for security

5. Children's Privacy

The App complies with the Children's Online Privacy Protection Act (COPPA). We are committed to protecting children's privacy:

• We do not knowingly collect personal information from children
• The app is designed to be safe and appropriate for users of all ages
• Parents can review ad content and control ad visibility

If you believe we have collected information from a child, please contact us immediately.

6. Permissions Used

The App uses the following device permissions:

• Internet: Required for advertisements, AI Tutor feature, and app updates
• Audio (Microphone): Optional, used only if you enable voice input in the AI Tutor
• Storage: To save your study progress locally

These permissions are used only for their stated purposes and are not shared with advertisers for targeting purposes.

7. Your Rights and Choices

You have the following options to protect your privacy:

• Opt out of personalized ads through Google's Ad Settings (device settings)
• Reset your advertising ID (allows new ad tracking to begin afresh)
• Disable microphone permission if not using voice input in AI Tutor
• Clear app cache and data through device settings if needed
• Uninstall the App at any time
• Contact us with any privacy-related questions or concerns

8. Changes to This Privacy Policy

We may update this Privacy Policy from time to time to reflect changes in our practices, technology, legal requirements, or other factors. Any material changes will be posted on this page, and the updated date will be reflected at the top of this document. Your continued use of the App following the posting of revised Privacy Policy means that you accept and agree to the changes.

9. Contact Us

If you have any questions, concerns, or requests regarding this Privacy Policy or our privacy practices, please contact us:

10. Compliance with Laws

This App complies with applicable privacy laws and regulations, including COPPA, GDPR, CCPA, and Google Play Console privacy requirements. We are committed to protecting user privacy and maintaining the highest standards of data protection.

Comparison: Free vs. Paid Version