# Privacy Policy for Silent Proof **Last Updated:** 2026-1-25 ## Introduction Silent Proof ("we," "our," or "us") is committed to protecting your privacy. This Privacy Policy explains how we collect, use, store, and protect information when you use the Silent Proof mobile application ("App"). By using the App, you agree to the collection and use of information in accordance with this policy. ## Information We Collect ### 1. Focus Session Data When you create and participate in focus sessions, we collect: - **Session Metadata**: Session labels, start time, end time, and duration - **Screen Activity**: Screen lock/unlock events and timestamps - **App Usage**: Foreground app changes detected during sessions (package names only) - **Violations**: Records of interruptions including screen unlocks, app switches, service interruptions, and device reboots with precise timestamps - **Session Status**: Whether your session maintained integrity (clean) or was interrupted ### 2. Device Information - **Device Hash**: A cryptographic hash derived from your device's Android ID, used for proof verification and tamper detection - **App Version**: The version of Silent Proof you are using ### 3. Analytics Data We calculate the following analytics from your session data: - Daily and weekly silent minutes - Longest clean session streak - Total sessions and session statistics - Focus activity patterns over time ### 4. Challenge Data (if applicable) If you create focus challenges, we store: - Challenge titles, descriptions, and goals - Challenge start and end dates - Progress tracking data ## How We Use Your Information We use the collected information to: - **Monitor Focus Sessions**: Track screen lock state and app usage during your focus sessions - **Generate Proof Reports**: Create tamper-evident proof certificates with cryptographic hashing - **Provide Analytics**: Calculate and display your focus statistics, streaks, and activity patterns - **Maintain App Functionality**: Ensure the monitoring service runs reliably and detects violations accurately - **Support Challenges**: Track progress toward your focus goals ## Data Storage and Security ### Local Storage Only **All data is stored exclusively on your device.** We do not: - Transmit your data to external servers - Sync your data to the cloud - Share your data with third parties - Use analytics services that collect your personal information ### Storage Method - Your session data, violations, and analytics are stored in a local SQLite database on your device - The database file (`silent_sessions.db`) is stored in your app's private data directory - Only the Silent Proof app can access this data ### Security Measures - **Cryptographic Hashing**: All proof reports use SHA-256 hashing to ensure tamper resistance - **Device Binding**: Proofs are cryptographically bound to your device using a device hash - **Local Access Only**: Data is stored in Android's protected app storage, accessible only by Silent Proof ## Permissions We Request The App requires the following permissions to function: ### 1. Usage Access (PACKAGE_USAGE_STATS) - **Purpose**: To detect when apps come to the foreground during focus sessions - **What We Monitor**: Only package names of apps that become active during your sessions - **What We Don't Monitor**: We do not track which specific apps you use outside of focus sessions, nor do we collect detailed usage statistics beyond what is necessary for violation detection ### 2. Foreground Service - **Purpose**: To continuously monitor your device state during active focus sessions - **Usage**: Runs only when you have an active focus session ### 3. Wake Lock - **Purpose**: To ensure the monitoring service continues running even when your screen is off - **Usage**: Active only during focus sessions ### 4. Screen State Detection - **Purpose**: To detect when your screen is locked or unlocked - **Usage**: Monitors screen state only during active focus sessions ### 5. Boot Receiver - **Purpose**: To detect device reboots that may interrupt focus sessions - **Usage**: Only checks for reboots during active sessions ### 6. Internet Permission - **Purpose**: Used for loading Google Fonts (if applicable) and other app resources - **Note**: This permission does not transmit your session data ## Data Sharing and Disclosure **We do not share, sell, or disclose your data to third parties.** The only exception is when you explicitly choose to export your proof reports: - **PNG Export**: You can share proof cards as images through your device's sharing system - **PDF Export**: You can export detailed proof reports as PDFs (Pro feature) and share them through your device's sharing system **You have complete control over what you share.** We do not automatically share any data. ## Your Rights and Choices ### Access Your Data - You can view all your session history, proofs, and analytics within the App - All data is stored locally and accessible through the App's interface ### Delete Your Data - You can delete individual sessions or all data by uninstalling the App - Uninstalling the App will remove all locally stored data from your device ### Revoke Permissions - You can revoke Usage Access permission at any time through Android Settings - Note: Revoking permissions will prevent the App from monitoring focus sessions ### Export Your Data - You can export individual proof reports as PNG images (free) or PDF documents (Pro) - Exported files are saved to your device and can be shared at your discretion ## Children's Privacy Silent Proof is not intended for children under the age of 13. We do not knowingly collect personal information from children under 13. If you are a parent or guardian and believe your child has provided us with personal information, please contact us so we can delete such information. ## Data Retention - Your data is retained on your device until you delete it or uninstall the App - We do not automatically delete your data - You can manually delete sessions through the App interface ## Changes to This Privacy Policy We may update this Privacy Policy from time to time. We will notify you of any changes by: - Posting the new Privacy Policy in the App - Updating the "Last Updated" date at the top of this policy You are advised to review this Privacy Policy periodically for any changes. Changes are effective when they are posted. ## Third-Party Services The App uses the following third-party services that may collect information: ### Google Fonts - **Purpose**: To load custom fonts for the App interface - **Data Collected**: Standard font loading requests (no personal data) - **Privacy**: Subject to Google's privacy policy ### Printing/Sharing Services - **Purpose**: To enable PDF and image export functionality - **Data**: Only the proof data you choose to export - **Control**: You control what and when to export ## International Users If you are using the App from outside the United States, please note that: - All data processing occurs locally on your device - No data is transferred across international borders - Your data remains subject to the laws of your jurisdiction ## Contact Us If you have any questions about this Privacy Policy or our data practices, please contact us at: **Email:** [Your Contact Email] **Website:** [Your Website URL] ## Compliance This Privacy Policy is designed to comply with: - General Data Protection Regulation (GDPR) - California Consumer Privacy Act (CCPA) - Children's Online Privacy Protection Act (COPPA) - Other applicable privacy laws ## Summary **Key Points:** - ✅ All data is stored locally on your device - ✅ No cloud sync or external servers - ✅ No data sharing with third parties - ✅ You control what you export and share - ✅ Cryptographic security for proof verification - ✅ Permissions used only for core app functionality **Your privacy is our priority.** Silent Proof is designed with privacy-first principles, ensuring that your focus session data remains yours alone. --- *This Privacy Policy is effective as of the date listed above and applies to all versions of the Silent Proof mobile application.*