D2 Health Club – Privacy Policy

Last Updated: July 24, 2025

Welcome to D2 Health Club (the "App"), owned and operated by KARTA CREATIVE LTD. We value your privacy and are committed to protecting your personal information. This Privacy Policy explains how we collect, use, share, retain, and protect your data when you use our App.

1. Data We Collect

1.1 Account Information

When you sign up using Sign in with Apple, we may collect:

• Email address (only if you choose to share it with us)
• Display name
• Username
• Avatar/Profile picture stored via Firebase Storage
• Signup date for account management

Thanks to Sign in with Apple, you can remain completely anonymous - we don't require your email address if you choose not to share it.

1.2 Fitness & Activity Data

We collect step tracking data from your iPhone's built-in sensors:

• Daily step goal (e.g., 10,000 steps)
• Total steps accumulated since signup
• Personal best daily step count
• Current streak of consecutive days meeting your goal
• Maximum streak achieved
• Goal completion status for today
• Last goal completion date
• Historical baseline for personalized recommendations

1.3 App Settings & Preferences

• Privacy settings (whether your profile is private)
• Onboarding completion status
• Accessibility preferences (wheelchair push inclusion)
• Pending goal changes

1.4 Analytics & App Usage

We collect basic analytics to improve the app experience:

• Page views and app events for usage analytics
• Crash reports to identify and fix bugs
• Performance metrics to optimize app speed

We do not collect location data - only step counts from your iPhone's sensors.

2. How We Use Your Data

We use your data to:

• Provide core app functionality including step tracking and goal setting
• Display leaderboards and enable friendly competition with other users
• Calculate and maintain your streaks and personal achievements
• Enable weekly reward draws for users with clean streaks
• Improve app performance and fix bugs through analytics
• Provide customer support when requested

3. Data Storage & Security

Your data is stored securely using Google Firebase with enterprise-grade security infrastructure. All data is:

• Encrypted in transit using industry-standard HTTPS protocols
• Encrypted at rest in Google's secure data centers
• Access-controlled with only authorized team members having limited access
• Backed up securely with Google's redundancy systems

4. Data Sharing

We do not sell your personal data. We only share data in these limited circumstances:

• Public leaderboards: Your username, step counts, and streaks are visible to other users
• Service providers: Firebase/Google for hosting and analytics
• Legal requirements: If required by law or legal process

You can make your profile private in the app settings to limit leaderboard visibility.

5. Data Retention & Deletion

We retain your data while your account is active. You can delete your account at any time:

• In-app deletion: Go to Settings → Update Profile → Delete Account
• Email request: Contact support@d2health.club

Upon deletion, your personal data is permanently removed from our systems. Anonymized, aggregated data may be retained for analytics purposes.

6. Your Rights

You have the right to:

• Access your personal data
• Correct inaccurate information
• Delete your account and data
• Make your profile private
• Opt out of analytics (contact us)
• Data portability (contact us)

7. Third-Party Services

We use these trusted third-party services:

• Apple Sign In: For secure, privacy-focused authentication
• Google Firebase: For data storage, hosting, and analytics
• iOS HealthKit: For step data collection (stays on your device until shared)

8. Changes to This Policy

We may update this Privacy Policy as our services evolve. We'll notify users of significant changes through the app or website. Continued use after changes indicates acceptance.

9. Contact Us

For questions about this Privacy Policy or your data:

Merlin Bergmann, Data Protection Officer
Email: support@d2health.club
Company: KARTA CREATIVE LTD