Privacy Policy

Last updated: March 7, 2026

1. Overview

CalcHub ("we", "us", "our") operates the website calchubs.org. This page informs you of our policies regarding the collection, use, and disclosure of information when you use our Service.

2. Information We Collect

CalcHub does not require user registration or login. We do not collect personally identifiable information such as your name, email address, or phone number.

All tax calculations are performed entirely in your browser. Your income data and calculation inputs are never sent to or stored on our servers.

3. Analytics (Google Analytics 4)

We use Google Analytics 4 (GA4) to understand how visitors interact with our website. GA4 may collect the following information automatically:

  • Pages visited and time spent on each page
  • Referring website or search terms
  • Browser type, operating system, and device type
  • Approximate geographic location (country/city level)
  • Interaction events (e.g., button clicks, calculator usage)

This data is aggregated and anonymized. We do not use it to identify individual users. For more information, see Google's Privacy Policy.

4. Advertising (Google AdSense)

We may display advertisements through Google AdSense on our website. Google AdSense uses cookies and similar technologies to serve ads based on your prior visits to this and other websites. Google's use of advertising cookies enables it and its partners to serve ads based on your browsing history.

You may opt out of personalized advertising by visiting Google Ads Settings. Alternatively, you can opt out of third-party cookies by visiting aboutads.info.

5. Cookies

Cookies are small data files stored on your device. We use cookies through third-party services (Google Analytics and Google AdSense) as described above. CalcHub itself does not set any first-party cookies.

You can instruct your browser to refuse all cookies or to indicate when a cookie is being sent. However, some features of our Service may not function properly without cookies.

6. Third-Party Links

Our website may contain links to external sites (e.g., IRS.gov, NTS.go.kr) for reference purposes. We are not responsible for the privacy practices of these external sites.

7. Children's Privacy

Our Service is not directed to anyone under the age of 13. We do not knowingly collect personally identifiable information from children under 13.

8. Changes to This Policy

We may update this Privacy Policy from time to time. Changes will be posted on this page with an updated "Last updated" date. Continued use of the website after changes constitutes acceptance of the revised policy.

9. Contact

If you have questions about these Terms of Service, please contact us at gayoungyeom@gmail.com.