Effective Date: November 3, 2025

Last Updated: November 13, 2025

1. Introduction

Welcome to DVR Time Traveler ("we," "our," or "the App"). This Privacy Policy explains how we handle your information when you use our mobile application.

DVR Time Traveler is a specialized calculator designed for law enforcement professionals to calculate DVR (Digital Video Recorder) DATE/TIME difference, event location and retention dates and generate reports for legal investigations.

2. Information We Collect

2.1 Personal Information

We collect ZERO personal information.

DVR Time Traveler does NOT collect, transmit, or store:

• Names, email addresses, or contact information
• Location data or GPS coordinates
• Device identifiers (beyond local device ID for app functionality)
• IP addresses or network information
• Photos, videos, or media files
• Contacts or calendar data
• Usage analytics or behavioral data

2.2 Case Data (Local Only)

When you use the app to calculate DVR DATE/TIME difference, event location, retention dates, generate reports, the following information is stored exclusively on your device using encrypted local storage:

• Case numbers (if entered)
• Date/time calculations (surveillance dates, event dates, retention periods)
• Police information (officer name, badge number, department - if entered)
• Location addresses (if entered for reports)
• DVR IDs (if entered)
• Notes (if entered)
• Generated report history
• Notes backup files (if created for export/import)

2.3 Device Information

The app generates a unique device ID stored locally to manage app settings and preferences. This ID:

• Is randomly generated on first app launch
• Stays on your device only
• Is NOT transmitted to any server
• Is used only for local data organization

3. How We Use Your Information

Since all data remains on your device, "we" don't use your information. YOU use the app to:

• Calculate DATE/TIME difference, event location, retention dates, generate reports for legal investigations
• Generate PDF reports for court proceedings
• Store report history locally for your reference
• Email reports directly from your device (using your device's email client)
• Export and import notes as backup files (.txt format) for data portability and device transfers

4. Data Storage and Security

4.1 Encryption

All sensitive case data is encrypted using:

• AES-256 encryption - Military-grade security standard
• Device keychain protection (iOS Keychain / Android Keystore)
• Secure delete - Data is securely wiped when deleted

4.2 Local Storage Only

Your data is stored using:

• Expo SecureStore - For sensitive case information (encrypted)
• AsyncStorage - For non-sensitive app preferences (not encrypted)
• Device file system - For generated PDF reports (stored in app sandbox)

4.3 No Cloud Storage

We do NOT use:

• Cloud databases (Firebase, AWS, Google Cloud, etc.)
• Remote servers for data storage
• Third-party analytics services (no Google Analytics, Mixpanel, etc.)
• Advertising networks
• Social media integrations

4.4 Crash Reporting (Sentry)

To ensure app stability and fix bugs quickly, we use Sentry for crash reporting. When the app crashes or encounters an error:

• What is sent: Error details, device type, OS version, app version, and anonymized device ID
• What is NOT sent: Case numbers, addresses, police information, DVR IDs, notes, or any case-sensitive data
• Why we do this: To identify and fix bugs before they affect more users
• Privacy protection: All text and images are masked in crash reports. Only technical error information is collected.
• Third-party: Sentry.io (ISO 27001 certified, GDPR compliant)
• Data retention: Crash reports are automatically deleted after 90 days

Note: Crash reporting is disabled during development and only active in production builds.

5. Data Sharing and Disclosure

We share ZERO case data because we have ZERO access to your case data.

The only data that leaves your device:

• Crash reports (technical only) - Sent to Sentry when app crashes (no case data)
• Email reports (by your choice) - Uses your device's native email client (Mail, Gmail, Outlook, etc.)
• Export PDF (by your choice) - Saves to your device's file system for manual sharing
• Notes backup files (by your choice) - Export notes as .txt files for backup/transfer, or import notes from backup files. All processing happens locally on your device.

5.1 Third-Party Services

DVR Time Traveler uses the following third-party service:

• Sentry.io - Crash reporting and error monitoring
  • Purpose: Identify and fix app crashes
  • Data collected: Error logs, device type, OS version (NO case data)
  • Privacy Policy: https://sentry.io/privacy/
  • Data location: United States (GDPR compliant)

5.2 Legal Requirements

Since we don't collect case data on servers, we have nothing to disclose to law enforcement or legal requests regarding your cases. Crash reports contain only technical data.

6. Your Rights and Choices

6.1 Data Access

You have complete access to all your data within the app at all times.

6.2 Data Deletion

You can delete your data at any time:

• Individual reports - Delete from Report History section
• All case data - Clear all data from app settings
• Complete removal - Uninstall the app (deletes all local data)

6.3 Data Portability

Export your data for portability:

• PDF Reports - Export reports for your records or legal proceedings
• Notes Backup - Export notes as .txt files to transfer between devices or create backups
• Selective Export - Choose specific note pages to export or import

6.4 No Account Required

The app works completely offline with no account creation, login, or registration required.

7. Children's Privacy (COPPA Compliance)

DVR Time Traveler is designed for professional law enforcement use and is not intended for children under 13. We do not knowingly collect information from children.

8. International Users (GDPR Compliance)

For users in the European Union, European Economic Area, and other regions with data privacy laws:

• Legal Basis: Not applicable - we don't process personal data
• Data Controller: You are the data controller of your own local data
• Right to Erasure: Delete data anytime within the app
• Data Transfers: No international data transfers occur

9. California Privacy Rights (CCPA Compliance)

For California residents:

• Right to Know: We collect zero personal information
• Right to Delete: Delete your local data anytime
• Right to Opt-Out: Not applicable - we don't sell data
• Non-Discrimination: Not applicable - no account or service tiers

10. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. Changes will be reflected by updating the "Last Updated" date at the top of this policy.

Significant changes will be communicated through:

• In-app notification on first launch after update
• Updated policy posted at this URL
• App store update notes

11. Security Disclaimer

While we implement industry-standard encryption (AES-256), no security system is 100% impenetrable. You are responsible for:

• Securing your device with a passcode/biometric lock
• Keeping your device OS updated
• Not jailbreaking/rooting your device (compromises security)
• Protecting PDF reports you generate and share

12. App Permissions

DVR Time Traveler requests minimal permissions:

• Storage - To save generated PDF reports locally
• Notifications (Optional) - For app update reminders (if enabled)

The app does NOT request:

• Camera or photo library access
• Microphone access
• Location services
• Contacts access
• Bluetooth or NFC

13. Contact Us

If you have questions about this Privacy Policy or our privacy practices, please contact us:

• Developer: SDTech
• Email: [email protected]
• App Name: DVR Time Traveler

We will respond to privacy inquiries within 30 days.

14. Acknowledgment

By using DVR Time Traveler, you acknowledge that you have read and understood this Privacy Policy and agree to its terms.