Privacy Policy

1. Information We Handle

Calculators run in your browser without an account. The basic and scientific calculators save entered expressions and results in your browser’s local storage. Recently used calculator links and your theme preference are also saved locally. The service worker caches website files for offline use. The calculator code does not send calculation history to a calculation server. Clearing this site’s browser storage removes these local records and preferences.

Some limited technical information may be processed automatically when you visit the site, such as browser type, device information, approximate location derived from network data, pages visited, and basic usage events. This helps us understand performance, reliability, and which tools are most useful.

2. Cookies, Ads, and Analytics

Google AdSense is our only advertising and monetization integration. Third-party vendors, including Google, use advertising cookies to serve ads based on your previous visits to this website or other websites. Google’s advertising cookies enable Google and its partners to personalize ads using visits across websites. Ad availability depends on Google’s approval and serving decisions.

You can manage personalized advertising through Google My Ad Center, and review participating vendors’ choices at YourAdChoices. Browser settings can also restrict cookies. These controls do not necessarily stop all advertising.

3. Third-Party Services

Google Analytics 4 measures site usage, including visited pages and browser/device information, and may use cookies and identifiers. Google Tag Manager loads configured tags. Learn how Google uses information from sites that use its services and about the Google Analytics opt-out browser add-on.

GitHub Pages hosts this website. The Contact page loads Bootstrap and the EmailJS library from jsDelivr. Hosting and library requests reveal technical request information, such as your IP address and browser headers, to those providers. See GitHub’s privacy statement and jsDelivr’s privacy policy.

When you submit the contact form, your name, email address and message are sent through EmailJS for email delivery so we can respond. See EmailJS’s privacy policy. Clicking an email or WhatsApp contact link opens that service, which processes information under its own policies. Do not submit passwords or sensitive personal information.

4. Data Security

We take reasonable steps to keep the website stable and secure. However, no website, internet transmission, or third-party service can be guaranteed to be completely secure. Please avoid entering confidential or sensitive personal information into calculator fields.

5. Your Choices

• Use OnlineCalMaster without creating an account.
• Clear cookies or browsing data from your browser at any time.
• Use browser privacy controls or extensions to limit analytics and advertising tracking.
• Contact us if you have a privacy question about this website.

6. Children's Privacy

OnlineCalMaster is not directed to children under 13. We do not knowingly collect personal information from children. If you believe a child has provided personal information through the site, please contact us so we can review the concern.

7. Changes to This Policy

We may update this Privacy Policy from time to time to reflect changes to the website, services, or legal requirements. The latest version will be posted on this page with an updated effective date.

8. Contact Us

If you have questions about this Privacy Policy or how OnlineCalMaster handles privacy, please reach us through the Contact Us page.