Privacy Policy

Last updated: May 13, 2026

DueDuo ("we", "our", or "us") operates the DueDuo mobile application (the "App"). This page explains how we collect, use, and protect your information.

1. Information We Collect

Account Information: When you register, we collect your email address and display name.

Inventory Data: The products, items, categories, and groups you create within the App.

Device Information: Device model, operating system version, and unique device identifiers for analytics and push notifications.

Advertising ID: For serving relevant ads via Google AdMob (if you are on the free plan).

2. How We Use Your Information

To provide and maintain the App's functionality
To send expiry reminder notifications (with your permission)
To serve advertisements (free plan users)
To improve the App based on usage patterns

3. Third-Party Services

We use the following third-party services:

Google AdMob — for in-app advertisements. AdMob may collect advertising ID data. See Google's Privacy Policy.
Expo / EAS — for app updates and push notifications.
Better Auth — for authentication and session management.

4. Data Storage & Security

Your data is stored securely on our servers. We implement reasonable security measures to protect your information, but no method of transmission over the internet is 100% secure.

5. Your Rights

You may request access to, correction, or deletion of your personal data at any time by contacting us. You can also delete your account from within the App settings.

6. Children's Privacy

The App is not intended for children under 13. We do not knowingly collect data from children.

7. Changes to This Policy

We may update this policy. Changes will be posted here with an updated "Last updated" date.

8. Contact

For questions about this policy, contact us at: johntangfung@gmail.com

DueDuo — Your expiry date tracker