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About Sentinel

Sentinel is the ultimate guardian for Type 1 Diabetes management, designed specifically for parents and caregivers who need unwavering reliability. It transforms your Wear OS watch into a standalone monitoring hub, allowing you to track real-time glucose levels for up to three loved ones simultaneously—right from your wrist.

Whether you rely on Nightscout, Dexcom, or local XDrip+, Sentinel unifies your data into a clear, intuitive dashboard with intelligent alerts that ensure you never miss a critical moment, even when your phone is out of reach.

Limitation of Use and Medical Disclaimer

  • Not a Medical Device: You acknowledge that Sentronica and the Sentinel software do not constitute a medical device, nor do they provide medical advice, diagnosis, or treatment. The Sentinel platform is strictly a secondary data visualization tool.
  • Not for Lifesaving Purposes: Sentronica Sentinel is not intended for lifesaving purposes. It must not be relied upon for critical monitoring where the failure or inaccuracy of data could lead to death, personal injury, or severe physical or environmental damage.
  • Dosing and Treatment: Users agree that they will not use the data displayed on the Sentinel interface for dosing decisions (e.g., insulin administration). All treatment decisions must be based on the primary glucose monitoring device (e.g., Dexcom, Libre, or fingerstick meter) as prescribed by a physician.
  • Data Integrity and Latency: You understand that data transmission to wearable devices is subject to technical limitations, including Bluetooth range, battery life, internet connectivity, and background process restrictions. Sentronica does not guarantee real-time accuracy or continuous availability of data. We are not responsible for any adverse health events resulting from a reliance on the data displayed on this software.

Subscription and Refund Policy

  • No-Refund Policy: All Sentronica Membership subscriptions are final. Sentronica LLC does not offer full or partial refunds, credits, or prorated adjustments for any subscription fees once they have been processed.
  • Pricing Adjustments: We reserve the right to modify our service pricing at any time. In the event of a price reduction, existing customers are not entitled to a refund or credit for the difference between the previous and current pricing.
  • Cancellation: You may cancel your subscription at any time via your Account dashboard. Upon cancellation, you will continue to have access to Sentinel features and team management until the end of your current billing period. No further charges will be applied after the effective date of cancellation, but no previous payments will be returned.


Privacy Policy for Sentinel: CGM Monitor

Last Updated: August 26, 2026

1. Introduction

Sentronica LLC ("we," "us," or "our") operates the "Sentinel: CGM Monitor" mobile application and Wear OS companion application (collectively, the "App"). We are committed to safeguarding your privacy and ensuring the security of your personal and health-related data.

2. Data We Collect and Process

The App processes only the data necessary to provide real-time monitoring, event logging, and alert notifications:

  • Health & Physiological Data: Continuous Glucose Monitor (CGM) readings, trend arrows, and delta metrics retrieved from your configured data sources (Dexcom Share, Nightscout, or xDrip+). When logging event snapshots from Wear OS, local sensor data (such as heart rate) may be captured at your explicit request.
  • Location Data (Optional): If you use the event/snapshot logging feature, coarse or precise location coordinates may be attached to the log entry for personal situational context. This data remains on your local device or is transmitted directly to your personal Nightscout instance; Sentronica LLC does not store, monitor, or track your real-time location.
  • Account & Authentication Information: Your email address and subscription status are used solely for account authentication, software licensing, and access management.
  • Third-Party Credentials: Account credentials and API tokens for connected data sources (e.g., Dexcom, Nightscout) are stored locally on your device in secure storage and used solely to fetch your readings.

3. How We Use Your Data

Your data is used strictly for the core functionality of the App, including:

  • Displaying real-time glucose values, trends, and history graphs on your connected Phone and Wear OS watch.
  • Delivering configurable visual, sound, voice, and haptic alerts for urgent glucose thresholds.
  • Synchronizing alert thresholds, display preferences, and active user profiles across your paired devices via encrypted communication channels.
  • Transmitting user-initiated event logs (treatments, notes, carbs, bolus) to your personal Nightscout server when configured.
We do not sell, rent, trade, or monetize your personal health data or credentials to third parties or advertising networks.

4. Foreground Service and Background Execution

To provide continuous monitoring and critical threshold alerts even when the screen is off or the App is closed, Sentinel utilizes Android Foreground Services (specifically classified under DATA_SYNC and CONNECTED_DEVICE). A persistent, non-intrusive system notification is displayed while background monitoring is active, as required by Android operating system policies.

5. Third-Party Integrations

The App connects to external services that you explicitly authorize (such as Dexcom Share servers or self-hosted/third-party Nightscout instances). The collection, storage, and processing of data by these external platforms are governed by their respective privacy policies and terms of service.

6. Data Retention and Security

Glucose telemetry and short-term trend data are cached locally on your device to enable immediate UI rendering and offline graphing. You can delete locally cached data at any time by clearing the App cache/storage in your device system settings or by uninstalling the App.

7. Account and Data Deletion

To request permanent deletion of your Sentronica account and all associated licensing records:
  • Log into your account portal at sentronica.com to cancel any active recurring subscriptions.
  • Send an email to support@sentronica.com with the subject line "Delete Account".
  • The request must originate from the email address associated with your registered Sentronica account.
  • We will verify and permanently delete your account records within 15 calendar days of receipt.

8. Contact Us

If you have any questions or concerns regarding this Privacy Policy or your data, please contact us at:
support@sentronica.com