Privacy Policy

Last updated: September 13, 2025

Introduction

This Privacy Policy describes how Moody Chart Calculator ("we," "our," or "us") collects, uses, and protects your information when you use our website and services. We are committed to protecting your privacy and ensuring transparency about our data practices.

Information We Collect

Information You Provide

  • Calculator input values (Reynolds number, relative roughness) - stored locally in your browser
  • Contact information if you reach out to us via email
  • Feedback or suggestions you provide

Automatically Collected Information

  • Usage analytics through Google Analytics (anonymized)
  • Device and browser information
  • IP address (anonymized)
  • Pages visited and time spent on site
  • Theme preferences (dark/light mode)

How We Use Your Information

  • To provide and improve our calculator services
  • To remember your preferences and input history (stored locally)
  • To analyze usage patterns and improve user experience
  • To respond to your inquiries and provide support
  • To ensure the security and proper functioning of our website

Data Storage and Security

Local Storage

Your calculator inputs and preferences are stored locally in your browser's localStorage. This data never leaves your device and is only used to enhance your user experience by remembering your previous inputs and settings.

External Services

We use Google Analytics to understand how our website is used. Google Analytics collects anonymized data about your visit, including pages viewed, time spent, and general location (country/region level). No personally identifiable information is collected.

Third-Party Services

Google Analytics

We use Google Analytics 4 to analyze website traffic and usage patterns. Google's privacy policy governs their use of data: Google Privacy Policy

Content Delivery Networks

We use CDNs (Tailwind CSS, Chart.js, Google Fonts) to deliver website resources efficiently. These services may collect basic technical information about your request.

Cookies and Tracking

Our website uses minimal cookies:

  • Essential cookies: Required for basic website functionality
  • Analytics cookies: Google Analytics tracking (can be opted out)
  • Preference cookies: Remember your theme choice and calculator inputs

Your Rights and Choices

  • Access: You can view any locally stored data in your browser's developer tools
  • Deletion: Clear your browser's localStorage to remove all locally stored data
  • Opt-out: Use browser settings or extensions to block Google Analytics
  • Contact: Email us to request information about any data we may have

Children's Privacy

Our website is not directed to children under 13. We do not knowingly collect personal information from children under 13. If you believe a child has provided us with personal information, please contact us.

Changes to This Policy

We may update this Privacy Policy from time to time. We will notify users of any material changes by updating the "Last updated" date at the top of this policy. Your continued use of our website after any changes indicates your acceptance of the updated policy.

Contact Us

If you have any questions about this Privacy Policy or our data practices, please contact us: