Privacy Policy

Last Updated: December 22, 2025

Our Commitment to Your Privacy

At NXT Sentinel, your privacy is not just a policy. It is our foundational architecture. We built this app specifically for people in vulnerable situations, which means we take data protection more seriously than most.

Zero Knowledge Architecture

We cannot access your data because we do not collect it. Voice processing, app lists, contacts, and your master password are all stored exclusively on your device.

Information We Do NOT Collect

  • Your trigger word: Stored and processed entirely on device using CoreML (iOS) or TensorFlow Lite (Android). Never sent to our servers.
  • Audio recordings: We do not record or store your voice. Sentinel uses real time keyword detection without recording.
  • App lists: Which apps you choose to hide stays on your phone in encrypted storage.
  • Emergency contacts: Contact information is stored locally in your device's secure keychain.
  • Location data (except during alerts): We only access your location when you trigger a duress alert, and only to send it directly to your emergency contacts via SMS.

Information We Do Collect (Minimal)

To provide the service, we collect only what is absolutely necessary:

  • Account Email: Used for authentication and optional backup of your account settings (not your sensitive data).
  • Device ID: A randomized token to identify your device for push notifications and account management.
  • Crash Reports: Anonymous diagnostic data if the app crashes (no personal information included).
  • Anonymous Usage Analytics: Basic metrics like "App Opened" to help us improve performance. No personally identifiable information.

How Emergency Alerts Work

When you trigger a duress alert, Sentinel sends an SMS message directly from your phone to your emergency contacts. This happens locally. Our servers are not involved in the alert process. The SMS contains:

  • • A predefined message (for example, "I am in danger. Please send help.")
  • • Your current GPS coordinates
  • • A timestamp

We do not log or store these alerts on our servers.

Third Party Services

We use the following vetted third party services:

  • Payment Processing: Stripe (for premium subscriptions). They handle payment data under their own privacy policy. We never see your card number.
  • Cloud Backup (Optional): If you enable cloud sync, we encrypt your settings (not sensitive data) before uploading to AWS/iCloud. You can disable this at any time.
  • Anonymous Analytics: Plausible Analytics (privacy focused, GDPR compliant, no cookies).

Your Rights

You have the right to:

  • • Access: Request a copy of any data we store about you (email, device ID).
  • • Delete: Request deletion of your account and any associated data.
  • • Opt Out: Disable analytics and cloud backup in app settings.

Data Retention

Since we do not collect sensitive data, there is very little to retain. If you delete your account, we remove your email and device ID within 30 days. On device data (trigger words, contacts, etc.) is deleted immediately when you uninstall the app.

Changes to This Policy

We will notify you via in app message if we make material changes to this policy. Continued use of the app after notification constitutes acceptance.

Contact Us

Questions or concerns about privacy?