Privacy Policy

This Privacy Policy explains how RenjiCalc ("RenjiCalc," "we," "us," or "our") handles information when you use the RenjiCalc mobile application (the "App") and related support channels.

Effective Date: February 23, 2026
Last Updated: February 23, 2026

1. Information We Collect

We do not require account registration and we do not intentionally collect direct identifiers like your full name, home address, or phone number within the App itself.

However, depending on how you use the App, the following information may be collected by us or our service providers:

• App Data Stored on Your Device: microwave wattage settings and calculation history are stored locally on your device.
• Advertising and Device Data: advertising identifiers, device information, approximate location, and ad interaction data may be collected by advertising partners (such as Google AdMob) to deliver, measure, and improve ads.
• Diagnostics Data: if enabled, crash logs, performance data, and diagnostic information may be collected (for example, through Firebase Crashlytics).
• Contact Information: if you contact us through Google Forms or email, we may receive the information you submit (such as email address and message contents).

2. How We Use Information

• Provide and maintain core App functionality.
• Respond to support requests and user inquiries.
• Monitor reliability, fix bugs, and improve product quality.
• Display and measure advertising.
• Comply with legal obligations and enforce our Terms of Service.

3. How Information Is Shared

We may share information with service providers that process data on our behalf, including advertising, analytics, crash reporting, form processing, and hosting providers. We may also disclose information if required by law, legal process, or to protect rights, safety, and security.

4. Third-Party Services

The App may use third-party services, including:

• Google AdMob (advertising)
• Firebase Crashlytics (diagnostics, if enabled)
• Google Forms (support inquiries)

These third parties may collect and process information under their own privacy policies.

5. Data Retention

Local App settings remain on your device until you delete them or uninstall the App. Information submitted through support channels may be retained as reasonably necessary to respond to requests, maintain records, resolve disputes, and comply with legal obligations.

6. Your Choices and Rights

• Device Controls: you can limit ad tracking through your device privacy settings.
• Delete Local Data: you can remove App data by deleting history/settings in the App or uninstalling the App.
• Requests: depending on your location, you may have certain rights regarding personal information we directly receive from you (such as through support requests). You can contact us using the support form listed below to make a request.

7. California Privacy Notice

For California residents, this section is provided as supplemental notice. In the last 12 months, we and/or our service providers may have collected limited device and advertising-related information, such as advertising identifiers and app interaction data, for app functionality, diagnostics, and advertising purposes. We do not knowingly sell personal information. You may request access to or deletion of personal information we directly receive from you (such as information submitted through support forms) by contacting us.

8. Do Not Track

Some browsers transmit "Do Not Track" (DNT) signals. Because no uniform industry standard for DNT exists, we do not currently respond to DNT signals in a standardized way.

9. Children's Privacy

The App is intended for general audiences and does not require age verification. We do not knowingly collect personal information from children. If you believe personal information from a child was submitted through our support channels, contact us so we can take appropriate action.

10. Security

We use reasonable administrative, technical, and organizational measures designed to protect information. No method of transmission or storage is completely secure, and we cannot guarantee absolute security.

11. International Transfers

Your information may be processed in countries other than your own, where data protection laws may differ.

12. Changes to This Policy

We may update this Privacy Policy from time to time. Material changes will be posted at this page with an updated "Last Updated" date.

13. Contact Us

If you have privacy questions or requests, contact us via our support form:
https://forms.gle/hrD5GFY5AmconL2dA