1. Overview & Core Philosophy

ConcreteCalc Pro provides free, open-access mathematical calculators for concrete estimation. Unlike many online tools, our service does not require registration, personal account signups, phone numbers, or credit card submissions. You can use every calculator and export tool anonymously.

2. Data We Do NOT Collect

• No Personal Identifiers: We do not ask for or collect names, addresses, phone numbers, or billing info to use our calculators.
• No Dimensional Transmission: The numbers, dimensions, and project names you input into our calculators are processed purely within your device's browser memory (client-side JavaScript). They are never sent to or stored on our servers.
• No Data Brokering: We do not sell, rent, trade, or monetize user data with third-party advertisers or data brokers.

3. "Save to My Projects" & Local Storage

When you use the "Save Estimate" feature to compare projects, the calculations are saved directly to your browser's localStorage under the key concretecalc_saved_projects.

This data lives exclusively on your computer or mobile device. You maintain complete control: you can clear individual estimates, wipe all saved projects via the "Clear All" button in the modal, or delete your browser cache at any time.

4. Service Worker & Offline Caching (PWA)

To provide offline capability on construction jobsites, our website registers a browser Service Worker (sw.js). This script caches static assets (HTML, CSS, JavaScript, and icons) locally on your device so you can access tools without an active cellular or internet connection. No personal data is stored in the service worker cache.

5. Server Logs & Analytics

Like standard web infrastructure, our hosting servers collect basic technical access logs, including:

• Internet Protocol (IP) address (anonymized where possible)
• Browser type and operating system
• Referral URL and requested pages
• Timestamp and HTTP status code

This data is used solely to maintain platform security, diagnose server issues, detect malicious scrapers, and ensure fast page load speeds worldwide.

6. Third-Party Links & Integrations

Our website may contain informational links to external construction associations (e.g., ACI, ASTM) or supplier references. We have no control over the privacy practices of external websites. We encourage you to review the privacy policies of any third-party sites you visit.

7. Updates to This Policy

We may periodically update this Privacy Policy to reflect technical improvements or legal requirements. Any modifications will be posted immediately on this page with an updated revision date.

8. Contact Us

If you have questions regarding this Privacy Policy or our client-side storage practices, please reach out via our Contact Page or email us at privacy@concretecalcus.com.