Privacy Policy

Effective / last updated: 2026-06-25

1. Information we collect and do not collect

GradeCalc has no sign-up process and does not request or collect directly identifying information such as your name, contact details or student ID. The credits, grades and ranks you enter into the calculators are used only within your browser, disappear automatically, and are never sent to or stored on our servers.

However, the following information may be generated and collected automatically while you use the site:

• Access IP address, browser type and version, operating system, and visit time
• Pages visited, the previous page (referrer), and device information
• Anonymous identifiers via cookies and similar technologies

2. Use of cookies

GradeCalc may use cookies to provide the service and to display ads. A cookie is a small text file a website stores in your browser to remember your visits and settings.

You can refuse or delete cookies in your web browser settings. Note that blocking cookies may limit some features and ad personalization. You can change cookie settings in the settings menu of each browser (Chrome, Safari, Edge, etc.).

3. Google AdSense and third-party advertising

GradeCalc serves ads through Google AdSense. Google and other third-party ad vendors may use cookies to serve personalized ads based on your prior visits.

• Google uses advertising cookies (such as the DoubleClick cookie) to serve ads based on your visits to this and other sites.
• You can opt out of personalized advertising at Google Ads Settings.
• You can review and opt out of third-party ad vendor cookies at www.aboutads.info.
• You can learn how Google handles data on the How Google uses data from sites that use its services page.

4. Analytics tools

We may use web analytics tools such as Google Analytics to improve the service. These tools use cookies to collect anonymized statistics such as pages visited and time on site, and do not identify specific individuals.

5. Data retention and third-party sharing

Because GradeCalc does not directly collect or store your personal information, no separate retention period applies. Automatically collected access and cookie information is processed and retained under the policies of the relevant providers, such as Google. Except as required by law, we do not sell or arbitrarily share user information with third parties.

6. Your rights

You have the right to refuse data collection through your browser cookie settings, and you can disable personalized ads in Google Ads Settings. For inquiries about data handling, contact us at the address below.

7. Children's data

GradeCalc is not primarily intended for children under 14 and does not knowingly collect children's personal information.

8. Changes to this policy

This privacy policy may be revised in line with legal or service changes, and any changes will be announced on this page. For significant changes we will update the effective date.

9. Contact

For inquiries about data handling, please contact jin@zerolabskorea.com.

Effective / last updated: 2026-06-25