Privacy Policy

Last updated: June 20, 2025

Overview

CalcMaster ("we," "our," "us") respects your privacy. This Privacy Policy explains how we collect, use, and protect information when you visit calcmaster.com (the "Site").

Information We Collect

Calculator Inputs

All calculator inputs and outputs are processed entirely in your web browser using JavaScript. No calculator data is sent to any server. Your measurements, calculations, and results remain on your device.

Automatically Collected Information

When you visit the Site, our web server and analytics providers may automatically collect:

  • IP address (anonymized)
  • Browser type and version
  • Operating system
  • Referring URL
  • Pages viewed and time spent
  • Device type (desktop, mobile, tablet)

Cookies

We use cookies for:

  • Essential cookies: Theme preference (dark/light mode) stored in localStorage
  • Analytics cookies: Google Analytics to understand site usage patterns
  • Advertising cookies: Third-party ad networks (Google AdSense, Ezoic) to serve relevant advertisements

How We Use Information

  • Improve calculator accuracy and user experience
  • Analyze site performance and fix technical issues
  • Serve relevant advertisements to support free access
  • Comply with legal obligations

Third-Party Services

Google Analytics

We use Google Analytics to understand how visitors use the Site. Google Analytics collects anonymized data about page views, session duration, and traffic sources. You can opt out using the Google Analytics Opt-out Browser Add-on.

Advertising Partners

We display advertisements through Google AdSense and/or Ezoic. These services use cookies to serve ads based on your browsing history. You can manage ad personalization through Google Ad Settings.

Data Retention

We do not store personal calculator data. Analytics data is retained according to our analytics provider's retention policies (default: 14 months for Google Analytics).

Your Rights

Depending on your jurisdiction, you may have the right to:

  • Access the personal data we hold about you
  • Request deletion of your personal data
  • Opt out of data collection and advertising cookies
  • Lodge a complaint with your data protection authority

Children's Privacy

The Site is not directed to children under 13. We do not knowingly collect personal information from children under 13.

Changes to This Policy

We may update this Privacy Policy periodically. Changes will be posted on this page with an updated "Last updated" date.

Contact

For privacy-related questions, contact us at our contact page.