1. Information We Collect

1.1 Guest Users (No Account)

If you use Philosophize without registering, we do not collect any personally identifiable information. Anonymous usage data and analytics may still be collected as described in Section 1.4.

1.2 Registered Users

If you choose to create an account, we collect the following information:

• Email address (if registering with email and password)
• Display name and profile information linked to your Google account (if registering with Google Sign-In)
• A unique user identifier generated at account creation

We do not collect your phone number, physical address, or payment information directly. Passwords are securely hashed and never stored in plain text.

1.3 Account-Linked Data

When you are signed in, the following data is saved to your account and stored securely in our database:

• Lesson progress and completion history
• Bookmarks and favorited content
• Streak and experience point (XP) data
• App preferences and settings

This data is tied to your account so it can be restored if you reinstall the app or switch devices. It is not shared with third parties.

1.4 Automatically Collected Information

Regardless of account status, certain technical data is collected automatically when you use the app:

• Device type, operating system version, and app version
• In-app events and interactions
• Crash logs and performance diagnostics
• General usage patterns and session duration

1.5 Advertising Data (Free Users)

If you use the free version of Philosophize, ads are displayed via Google AdMob. AdMob may collect and use data to serve personalized or non-personalized ads, including:

• Device identifiers (such as the Android Advertising ID)
• IP address and approximate location
• Ad interaction data (impressions, clicks)

Google AdMob operates under Google’s own privacy policy: policies.google.com/privacy

1.6 Analytics Data

We use PostHog to understand how users interact with the app. PostHog collects anonymized usage data. For registered users, analytics events may be associated with your anonymous user ID but are never linked to your email address or real name.

2. How We Use Your Information

We use the information we collect to:

• Create and manage your optional user account
• Sync your progress, bookmarks, streaks, and preferences across devices
• Operate, maintain, and improve Philosophize
• Diagnose bugs, crashes, and technical issues
• Understand which features and content resonate with users
• Display relevant advertisements to free-tier users via Google AdMob
• Process and manage premium subscriptions via RevenueCat

We do not sell your personal data. We do not use your data for any purpose beyond those listed above.

3. Data Storage and Security

Account data for registered users is stored securely using Supabase, a managed cloud database platform. Supabase provides encryption at rest and in transit, and operates on industry-standard infrastructure. You can review Supabase’s security practices at: supabase.com/security

Passwords are never stored in plain text. Google Sign-In authentication is handled entirely by Google — we only receive a secure token confirming your identity.

While we take reasonable technical measures to protect your data, no system is completely secure. We encourage you to use a strong, unique password if registering with email.

4. Premium Subscriptions

If you upgrade to a premium (ad-free) subscription, your purchase is processed through the Google Play Store. We do not handle your payment information directly. Subscription entitlements are managed through RevenueCat.

RevenueCat may collect limited data necessary to validate and manage your subscription status. Review their privacy policy at: revenuecat.com/privacy

5. Third-Party Services

Philosophize integrates the following third-party services, each governed by their own privacy policies:

• Google AdMob — advertising
• Google Sign-In — authentication
• PostHog — product analytics
• Supabase — account data storage
• RevenueCat — subscription management

6. Data Retention

Account data is retained for as long as your account is active. If you delete your account, your personal information and all account-linked data (progress, bookmarks, streaks, preferences) will be permanently deleted from our systems within 30 days.

Anonymized analytics data may be retained by PostHog per their own retention policies. Crash logs and diagnostics are typically retained for 90 days.

7. Your Rights and Choices

7.1 Use Without an Account

You may use Philosophize at any time without registering. No account is required to access the core app experience.

7.2 Access and Correction

If you have a registered account, you can review and update your profile information at any time from within the app settings.

7.3 Account Deletion

You may delete your account at any time from the app settings. Deleting your account will permanently remove your email address, profile, and all associated data from our systems within 30 days.

7.4 Opt Out of Personalized Ads

You can opt out of personalized advertising through your Android device settings:

• Go to Settings > Google > Ads
• Enable “Opt out of Ads Personalization” or reset your Advertising ID

Upgrading to a premium subscription removes all ads entirely.

7.5 Data Portability

If you would like a copy of the data associated with your account, please contact us at the email below and we will fulfill your request within 30 days.

8. Children’s Privacy

Philosophize is not directed at children under the age of 13. We do not knowingly collect personal information from children. If you believe a child has created an account or provided personal data through the app, please contact us immediately and we will remove it promptly.

9. Changes to This Policy

We may update this Privacy Policy from time to time. When we do, we will update the effective date at the top of this document. Significant changes will be communicated via an in-app notice. Continued use of Philosophize after changes are posted constitutes your acceptance of the updated policy.

10. Contact Us

If you have questions, concerns, or requests related to this Privacy Policy or your account data, please contact us:

We are committed to responding to all privacy-related inquiries within 30 days.