Privacy Policy — Zero-Telemetry Guarantee

1. Zero-Knowledge Client-Side Architecture

Unlike traditional web applications that transmit form data to remote servers for processing, CalcWorker executes 100% of all calculations locally within your web browser using client-side JavaScript.

When you enter financial figures (such as annual salary, mortgage balances, loan terms, credit card debt, or tax deductions) or health metrics (such as weight, height, or caloric targets), none of this data ever leaves your device. Our web servers do not receive, process, inspect, intercept, or store any numbers entered into our tools.

2. Information We Never Collect

To ensure total transparency, we explicitly state what our systems do not collect:

• We do not require user accounts, email registration, passwords, or usernames.
• We do not collect Social Security Numbers (SSN), Employer Identification Numbers (EIN), or banking account numbers.
• We do not store credit card numbers, payment credentials, or financial statements.
• We do not log calculator input values or calculation results on our backend servers.

3. Third-Party Analytics & Advertising Partners

To sustain our free public utility, CalcWorker partners with established third-party services for site analytics and non-intrusive display advertising:

• Google Analytics (GA4): We utilize Google Analytics (Tag ID: G-1QCQNSCVQM) to collect aggregated, anonymized telemetry regarding page visits, device types, browser categories, and referral paths. This helps us optimize website performance and user experience. IP addresses are anonymized.
• Google AdSense: We display online advertisements served by Google AdSense (Publisher ID: pub-3405098265613384). Google uses cookies (including the DoubleClick cookie) to serve ads based on your prior visits to our website or other websites across the internet.

You may opt out of personalized advertising by visiting Google Ads Settings or through the Network Advertising Initiative opt-out page.

4. Local Storage & Cookie Usage

CalcWorker utilizes browser localStorage solely to preserve non-identifying user interface preferences, specifically your dark/light theme choice (calcworker_theme) and calculation state. This data resides strictly on your local device and is never uploaded to external servers. You can clear this data at any time by clearing your browser cache.

5. CCPA & GDPR Privacy Compliance

Under the California Consumer Privacy Act (CCPA) and the General Data Protection Regulation (GDPR), users possess fundamental privacy rights:

• Right to Know & Access: You have the right to request disclosure of categories of personal information collected. Because CalcWorker does not maintain user databases, we hold zero personally identifiable records.
• Right to Delete: Since no user calculation records exist on our servers, no user data deletion requests are necessary.
• Do Not Sell My Personal Information: CalcWorker does not sell, rent, or trade user data to data brokers or marketing intermediaries.

6. Corporate Data Controller Contact

If you have inquiries or feedback regarding this Privacy Policy or our zero-telemetry architecture, contact our compliance officer at Zaviyan LLC: