Privacy Policy - SakeRhythm

Data Collection and Usage

Local Data Storage Only: SakeRhythm stores all user data locally on your device using Apple's SwiftData framework. We do not collect, transmit, or store any personal information on external servers.

What Data is Stored Locally:

📊 Drinking session configurations (participant count, session type)
⏱️ Session timestamps and duration data
💡 Health tip interaction history
🚨 Emergency consultation logs (if used)
⚙️ App settings and preferences

What We DO NOT Collect:

❌ Personal identification information
❌ Location data
❌ Medical or health records
❌ Biometric data
❌ Contact information
❌ Analytics or usage tracking data

Data Security

All data is stored securely on your device using Apple's built-in security measures including:

🔐 iOS sandbox security
📱 Device-level encryption
🛡️ SwiftData's secure storage framework

Third-Party Services

No Third-Party Analytics: SakeRhythm does not integrate with any third-party analytics services, advertising networks, or data collection platforms.

iOS System Features: The app uses Apple's built-in features including:

📱 Dynamic Island and Live Activities
🔔 Local notifications
☎️ Emergency calling (only when explicitly activated by user)

Medical Disclaimer

⚠️ Important: SakeRhythm is not a medical device and does not provide medical advice, diagnosis, or treatment. The app:

🚫 Does not perform medical assessments
🚫 Does not store medical information
🚫 Does not make health-related decisions
✅ Provides general wellness tips only
✅ Encourages users to make their own health decisions

Data Deletion

You can delete all app data by:

📱 Uninstalling the app from your device

Once deleted, data cannot be recovered as we do not store backups on external servers.

Age Restrictions

20+ Only in Japan: This app is intended for users who are of legal drinking age in Japan (20 years and older). The app includes appropriate age verification measures.

Contact Information

If you have questions about this privacy policy or the app's data practices, please contact:

Developer: Keisuke Karijuku
App: SakeRhythm (サケリズム)
Market: Japan Only

Policy Updates

Last Updated: [Date to be set upon app release]

This privacy policy may be updated to reflect changes in the app or legal requirements. Users will be notified of significant changes through the app update process.