Vitallog is designed from the ground up to keep your health data private. All data is stored locally on your device. We do not collect, transmit, or share any of your information.
Data Collection
Vitallog does not collect any personal data. Specifically:
- We do not collect analytics or usage data
- We do not use any third-party tracking or advertising SDKs
- We do not collect device identifiers
- We do not collect location data
- We do not transmit any data to our servers or any third party
Data Storage
All data you enter into Vitallog — including vital sign readings, medication logs, health summaries, and profile information — is stored exclusively on your device using Apple's on-device database (SwiftData). This data never leaves your device unless you explicitly choose to export it.
Encrypted Backups
Vitallog offers an optional encrypted backup feature that allows you to export your data as a password-protected file. Key details:
- Backups are encrypted with AES-256-GCM using a password you choose
- The encrypted file is saved to a location you select (e.g., Files app, iCloud Drive, email)
- We never have access to your backup files or your encryption password
- Without your password, the backup file cannot be decrypted by anyone
On-Device AI Summary
Vitallog's "Doctor's Summary" feature uses Apple Intelligence (when available on your device) to generate health summaries. This processing happens entirely on your device using Apple's on-device language model. No health data is sent to any server — not to us, not to Apple, and not to any third party. On devices without Apple Intelligence, a template-based summary is generated locally instead.
Drug Interaction Checks
Vitallog includes a local database of common drug interactions. All interaction checks are performed on your device. No medication data is transmitted externally.
Biometric Authentication
Vitallog offers an optional Face ID / Touch ID lock. Biometric data is handled entirely by Apple's LocalAuthentication framework on your device. Vitallog never accesses, stores, or transmits biometric data.
Notifications
If you enable reminders, Vitallog uses local notifications scheduled on your device. No notification data is sent to external servers. Push notification services are not used.
Children's Privacy
Vitallog is not directed at children under the age of 13. We do not knowingly collect information from children.
Medical Disclaimer
Vitallog is designed for personal health tracking and informational purposes only. It does not provide medical advice, diagnoses, or treatment recommendations. The classifications and summaries generated by the app are based on published medical guidelines but should not be used as a substitute for professional medical care. Always consult your healthcare provider for medical decisions.
Third-Party Services
Vitallog does not integrate with any third-party services, APIs, or SDKs that collect user data. The app contains:
- Zero advertising frameworks
- Zero analytics libraries
- Zero social media SDKs
- Zero crash reporting tools that transmit data externally
Changes to This Policy
If we update this privacy policy, we will post the revised version on this page with an updated effective date. Since Vitallog collects no data, changes are unlikely but would only occur if new features are added.
Contact
If you have questions about this privacy policy or Vitallog's data practices, please contact us at:
Effective Date: March 19, 2026