Glucose Compass — Privacy Policy

Last updated: March 2026

Glucose Compass ("the App") is a Type 1 Diabetes tracking app developed by Alex Bonacci ("we," "us," "our"). We take your privacy — especially regarding health data — very seriously. This policy explains what data we collect, how it is stored, and when it leaves your device.

1. What Data We Collect

• Health data — blood glucose readings, meals & carbohydrate counts, symptoms, insulin doses, and free-text notes.
• Emergency contacts — names and phone numbers you add for extreme-glucose alerts.
• AI API keys — stored locally on your device via expo-secure-store. Keys are never sent to our servers.
• Usage analytics — anonymous crash and usage data to help us improve app stability.
• Advertising identifiers — standard device identifiers used solely for non-personalized ads.

2. How Data Is Stored

All health data is stored locally on your device in a SQLite database. There is no cloud sync, no remote backup, and no account required. API keys are stored via expo-secure-store, which uses the iOS Keychain under the hood.

3. When Data Leaves Your Device

Your data leaves your device only when you explicitly request an AI insight. At that point, a snapshot of recent data — glucose readings, meals, and symptoms — is sent to the selected AI provider. Your name, location, and account details are never included in any AI request.

4. AI Provider Data Handling

• The default AI provider is Google Gemini (free tier).
• Lifetime-tier subscribers can use BYOK (Bring Your Own Key) to connect alternative providers such as Groq, OpenRouter, or Anthropic.
• AI providers do not persistently store the data sent during a request.
• You can disconnect AI at any time in Settings > AI Settings.
• All AI-generated content is accompanied by a medical disclaimer reminding you to consult your healthcare provider.

5. Advertising

Glucose Compass displays non-personalized ads served by Google AdMob. Your health data is never used for ad targeting. The App Tracking Transparency (ATT) prompt is shown before any tracking identifiers are accessed. Premium and Lifetime subscribers see no ads at all.

6. Subscription & Purchase Data

Subscriptions are managed by RevenueCat, which processes purchase receipts through Apple. RevenueCat does not have access to any of your health data. For details, see RevenueCat's Privacy Policy.

7. Third-Party Services

8. Data Deletion

• Delete the app = delete all your data. There is no cloud backup or server-side copy.
• Disconnect AI in Settings > AI Settings to clear stored API keys.
• Manage or cancel your subscription via iOS Settings > Apple ID > Subscriptions.

9. Children's Privacy

Glucose Compass is not directed at children under 13. If a parent or guardian manages diabetes data for a minor, the parent or guardian is responsible for the data entered. We do not knowingly collect personal information from children under 13.

10. Contact & Changes

If you have questions about this privacy policy or your data, contact us at: bonaccivfx@gmail.com

We may update this policy from time to time. Changes will be posted at this URL with an updated "Last updated" date. Continued use of the App after changes constitutes acceptance of the updated policy.