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Privacy Policy: Nimbus Shield

Last Updated: June 10, 2026

1. Introduction

Nimbus Shield ("we," "us," "our," or "the App") is developed by Zymric and is committed to protecting your privacy. This Privacy Policy explains how we collect, use, store, and protect your information when you use the App.

Our core principle: Your health data belongs to you. It stays on your device by default.

2. Data Collection: What We Collect

2.1 Data You Enter (Local-Only)

The following data is collected and stored locally on your device by default:

  • Migraine episodes: Date, time, pain level, duration, symptoms (aura, nausea, light sensitivity, sound sensitivity), triggers, notes
  • Medications: Name, dosage, type (acute/preventive), active status
  • Medication efficacy: Whether a medication helped for a specific episode
  • Daily check-ins: Water intake, sleep hours, sleep quality, exercise, stress level
  • Weather data: Temperature, barometric pressure, weather codes (fetched from Open-Meteo API based on your location)
  • Settings: Your name, location coordinates (for weather), preferences
  • Milestones: Achievement tracking data

2.2 Data We Do NOT Collect

We do NOT collect, transmit, store, or access any of your data on external servers by default. Specifically:

  • We do NOT collect personal identifiers (email, phone number, device ID)
  • We do NOT access your contacts, photos, camera, or microphone
  • We do NOT track your location in real-time (only manual lat/lon input for weather)
  • We do NOT use advertising SDKs or ad networks
  • We do NOT sell or share your personal data with third parties
  • We do NOT share data with third parties
  • We do NOT store data in the cloud by default
  • We do NOT access your health data from other apps or services

2.3 Third-Party Data Sources

The App uses one third-party service: Open-Meteo API (open-meteo.com), a free, open-source weather API. When you enable weather correlation, the App sends your manually-entered latitude and longitude to Open-Meteo to fetch weather data. Open-Meteo does not require an API key and does not track individual users. See Open-Meteo's terms.

3. Data Storage

All data you enter is stored in an encrypted SQLite database on your device by default. The database stays on your device unless you explicitly export it. The App does not sync, back up, or transmit your data to any cloud service by default.

4. Data Export

You can export your data at any time through the Settings screen:

  • JSON export: Full database dump for backup or migration
  • PDF doctor report: Formatted medical summary for sharing with healthcare providers

These exports are generated on-device and shared only through the system share sheet. We do not receive or store these exports.

5. Data Sharing

We do not share, sell, rent, trade, or otherwise disclose your personal information or health data to any third party. The only circumstances under which your data leaves your device is when you explicitly export or share it.

6. Data Security

Your data is stored in an encrypted SQLite database on your device. The security of your data depends on the security of your device. We recommend using a strong device passcode, keeping your OS up to date, and not rooting your device.

Since we do not store your data on external servers by default, there is no risk of server-side data breaches affecting your health information.

7. Data Retention

Your data remains on your device until you delete individual entries, use the "Clear All Data" function, or uninstall the App. When you uninstall, all locally stored data is deleted by the operating system. We do not retain any copies.

8. Your Rights

You can access, export, edit, and delete all your data at any time through the App's built-in features. If you are located in the EEA, you have additional rights under GDPR. If you are a California resident, you have rights under CCPA. Since all data is stored locally, most rights are exercised directly through the App.

9. Children's Privacy

The App is not intended for use by children under the age of 13. We do not knowingly collect personal information from children.

10. Medical Disclaimer

Nimbus Shield is a tracking tool, not a medical device. It does not provide medical advice, diagnosis, or treatment recommendations. Always consult a qualified healthcare provider for any health-related decisions. Never disregard professional medical advice because of information obtained through the App.

11. Changes to This Policy

We may update this Privacy Policy from time to time. Changes will be posted within the App and reflected in the "Last Updated" date. Your continued use of the App constitutes acceptance of the revised policy.

12. Contact

For questions or concerns about this Privacy Policy, contact: hello@zymric.xyz

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