Privacy Policy

Effective Date: February 27, 2026  |  Last Updated: February 27, 2026

1. Introduction

Welcome to HeartGuard ("we," "our," or "the App"). We are committed to protecting your privacy and ensuring the security of your personal health information. This Privacy Policy explains how the App handles your data when you use our Blood Pressure tracking and health management application.

2. Information We Collect

The App collects and stores the following information locally on your device:

2.1 Health Data

• Systolic Blood Pressure readings (mmHg)
• Diastolic Blood Pressure readings (mmHg)
• Heart rate measurements (bpm)
• Measurement time (morning, afternoon, or evening)
• Body posture during measurement (sitting, lying, or standing)
• Personal notes associated with readings
• Date and time of each recording

2.2 Family Member Profiles

• Name
• Gender
• Date of birth
• Height (cm)
• Weight (kg)

2.3 App Preferences

• Reminder notification settings
• High Blood Pressure alert preferences

3. How We Store Your Data

Data Type	Storage Location	Method
Health records	Device only	Local SQLite database (Room)
Family profiles	Device only	Local SQLite database (Room)
Preferences	Device only	Android DataStore

All data is stored exclusively on your device using Android's built-in secure storage mechanisms. We do not operate any servers or cloud infrastructure to collect, store, or process your data.

4. Data Sharing and Disclosure

We do not share, sell, rent, or disclose your personal or health data to any third parties. Specifically:

• No data is transmitted to our servers (we do not have any)
• No data is shared with advertisers
• No data is shared with analytics providers
• No data is shared with other apps or services
• No data is used for marketing purposes

4.1 Data Export

The App provides a data export feature that allows you to export your HeartGuard records. This export is initiated solely by you and the exported data remains on your device. You have full control over what you do with the exported data.

5. Third-Party Services

The App does not integrate any third-party services that collect user data. Specifically, the App does not use:

• Analytics or tracking tools (e.g., Google Analytics, Firebase Analytics)
• Advertising networks (e.g., Google AdMob)
• Crash reporting services (e.g., Crashlytics)
• Social media SDKs
• Cloud storage services

6. Permissions

The App requests the following Android permissions:

Permission	Purpose
INTERNET	Required by the image loading library (Coil) for internal resource handling. No user data is transmitted over the network.

7. Children's Privacy

The App is not directed at children under the age of 13. We do not knowingly collect personal information from children under 13. The family member feature is intended for adults to track health data for their household members under their own supervision.

8. Data Retention and Deletion

Your data is retained on your device for as long as you choose to keep it. You can delete your data at any time through the following methods:

• Delete individual Blood Pressure records from the History screen
• Delete family member profiles from the Family screen
• Clear all app data through your device's Settings > Apps > HeartGuard > Clear Data
• Uninstall the App, which will permanently remove all associated data from your device

9. Data Security

We take the security of your health data seriously. The App leverages Android's built-in security features to protect your data:

• All data is stored in the App's private storage directory, inaccessible to other apps
• Data is protected by your device's lock screen and encryption settings
• No data is transmitted over the internet, eliminating network-based security risks

We recommend that you keep your device's operating system up to date and use a secure lock screen to further protect your health data.

10. Your Rights

Since all data is stored locally on your device, you have full and direct control over your information. You can:

• Access your data at any time within the App
• Export your data using the built-in export feature
• Delete any or all of your data at any time
• Modify your family member profiles and settings

11. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. Any changes will be reflected by updating the "Last Updated" date at the top of this page. We encourage you to review this Privacy Policy periodically. Continued use of the App after any changes constitutes your acceptance of the updated policy.

12. Contact Us

If you have any questions, concerns, or requests regarding this Privacy Policy or the App's data practices, please contact us at:

• Email: huanniuhk@gmail.com

13. Compliance

This Privacy Policy is designed to comply with applicable data protection regulations, including:

• General Data Protection Regulation (GDPR) - European Union
• California Consumer Privacy Act (CCPA) - United States
• Google Play Developer Program Policies