Privacy Policy

At OzTradie Calc (oztradiecalc.com), we are firmly committed to protecting your personal information and respecting your digital privacy. This Privacy Policy details how data is handled when you access and use our suite of Australian trade calculators, pricing worksheets, and business utilities.

1. Zero-Knowledge Client-Side Calculations (100% Private)

The core architectural principle of OzTradie Calc is absolute user privacy. When you input measurements, trade hourly rates, business expenses, electrical loads, timber dimensions, or customer details into our tools:

• Nothing is transmitted to our servers. All mathematical formulas, material take-offs, span validations, and PDF invoice generation routines execute exclusively inside your web browser using client-side JavaScript.
• We do not record, store, log, harvest, or sell any of your numbers, financial estimates, project dimensions, or client invoices.
• You are never required to register, create an account, or log in to use any calculator on this website.

2. Hosting Infrastructure & Cloudflare Edge Logging

OzTradie Calc is hosted on Cloudflare Pages and routed through Cloudflare's global content delivery network (CDN) and security edge. When you request any page or tool on oztradiecalc.com, Cloudflare's edge servers automatically process standard diagnostic and telemetry data to securely route your request:

• Technical Diagnostic Telemetry: Cloudflare edge servers log the client Internet Protocol (IP) address, operating system, browser type and version, referring URL, HTTP request headers, TLS encryption cipher, and request timestamps.
• DDoS Mitigation & Edge Security: IP addresses and connection metadata are processed strictly to detect and block malicious bot traffic, prevent Distributed Denial of Service (DDoS) attacks, and route network requests to the geographically nearest Australian edge data centre (e.g. Sydney, Melbourne, Brisbane, Perth).
• Essential Security Cookies: Cloudflare may place necessary security tokens or cookies (such as __cf_bm for bot management or Turnstile challenge verification) on your device. These cookies contain no personally identifiable information and are used solely to distinguish legitimate human tradies from malicious automated scripts.
• Zero Storage of Calculation Data: Cloudflare acts solely as an edge transport and caching network. None of your calculator parameters, timber dimensions, electrical loads, or invoice figures pass through or are logged by Cloudflare's servers.

3. Site Analytics & Google Analytics 4 (GA4)

We utilize Google Analytics 4 (GA4) to monitor aggregated, non-personally identifiable site usage trends across Australia. This helps our development team understand which trade calculators are most useful, measure page load speeds, and identify user experience bottlenecks:

• Metrics Collected: GA4 collects anonymous interaction data, including pages visited, session duration, device type (mobile, tablet, desktop), screen resolution, operating system, approximate geographic region (e.g. Sydney, Brisbane, Melbourne), and referring traffic sources.
• First-Party Analytical Cookies: Google Analytics utilizes first-party cookies (such as _ga and _ga_*) to distinguish unique visitor sessions. By default in GA4, IP addresses are processed temporarily for coarse geolocation and are not logged or stored.
• Zero Financial or Project Tracking: Google Analytics has zero access to any numbers you type into our calculators. Your hourly charge-out rates, tax bracket calculations, cable lengths, and invoice line items are never sent to or recorded by Google Analytics.
• Analytics Opt-Out: If you prefer not to have your aggregate session data included in our performance analytics, you can install the official Google Analytics Opt-out Browser Add-on or block third-party analytical cookies within your web browser settings.

4. Mediavine Programmatic Advertising & Third-Party Partners

The Website works with Mediavine (including Journey by Mediavine) and certified advertising exchanges to manage third-party interest-based advertising appearing on the Website. Mediavine serves content and advertisements when you visit the Website, which may use first-party and third-party cookies. A cookie is a small text file sent to your device by a web server.

Mediavine and its advertising partners may collect information about your visits to the Website and other websites to provide advertisements about goods and services of interest to you. This information may include your IP address, operating system, device type, language settings, web browser type, and approximate location.

• Interest-Based Advertising: Mediavine partners with third-party data providers and programmatic ad exchanges to deliver personalized, relevant advertisements.
• Zero Access to Calculator Logic: Advertisers and advertising networks have no access whatsoever to your trade calculations, job estimates, timber orders, or invoice contents. All calculation routines execute strictly in isolated client-side browser memory.
• Managing & Opting Out of Interest-Based Ads: Users have complete control over advertising cookies and can opt out of personalized advertising at any time:
  • To learn more about Mediavine's data collection and privacy practices, or to opt out, visit the Mediavine Privacy Policy.
  • Your Online Choices (Australia - EDAA)
  • Network Advertising Initiative (NAI) Consumer Opt-Out
  • Digital Advertising Alliance (DAA) WebChoices Tool

5. Affiliate Marketing & Amazon Associates Disclosure

OzTradie Calc participates in select affiliate marketing programs to generate revenue that funds the ongoing maintenance and development of our free trade tools.

Amazon Associates Participation: OzTradie Calc is a participant in the Amazon Services LLC Associates Program and Amazon Associates Australia, an affiliate advertising program designed to provide a means for websites to earn advertising fees and commissions by advertising and linking to amazon.com.au and affiliated Amazon properties.

• Tracking Cookies: When you click on an affiliate link on OzTradie Calc and make a qualifying purchase, Amazon or the respective affiliate merchant may place a temporary tracking cookie on your browser to attribute the referral. These cookies are governed by the merchant's independent privacy policy.
• Zero Impact on User Price: Purchasing products through our affiliate links incurs zero additional cost to you. Product pricing is identical whether you use our link or navigate directly to the merchant.
• Zero Access to Calculation Data: Affiliate merchants have no access to your financial estimates, dimensions, or inputs entered into our calculators.

6. External Links

Our articles, technical guides, and calculators contain links to authoritative Australian government portals and industry standard bodies (such as the Australian Taxation Office - ATO, Fair Work Ombudsman, Standards Australia, and state building commissions). We do not control and are not responsible for the content, security, or privacy policies of third-party external websites.

7. Children's Privacy Protection

OzTradie Calc provides commercial calculation utilities intended strictly for qualified tradespeople, contractors, apprentices, and adults managing home building projects. We do not knowingly collect, request, or retain personal data from children under the age of 16.

8. Changes to this Privacy Policy

We reserve the right to modify this Privacy Policy periodically to reflect technological advancements, adjustments in our advertising partnerships, or statutory updates under the Australian Privacy Act 1988 (Cth). Any revisions will be published on this page with an updated revision date.

9. Contact Us

If you have questions, feedback, or privacy-related inquiries regarding our website, please contact our administrative team: