Privacy

Last updated 2 October 2026

Heartline Works is a library of downloadable design files and supporting calculators. We keep data collection to the minimum the site needs to work.

Calculators and tools

Calculator inputs are processed in your browser. They are not sent to our server or stored. Tools that read a file (such as the SVG checker) process it only to produce your result.

Downloads

To limit abuse, the server keeps a one-way hash of your IP address for up to one hour to count downloads and apply a fair-use limit. We also keep aggregate counts of how often each design and format is downloaded. These counts are not linked to a person.

Rates and market data

Reference metal prices and exchange rates are fetched by our server from third-party providers and cached. Your browser requests them from this site, not from the providers.

Cookies

The site does not set advertising or tracking cookies. Cookies used by the hosting platform, caching or security tools are limited to making the site work. If this changes, this page will say so before it happens.

Your choices

To ask a question about this policy or request correction or removal of anything you have sent us, use the contact page.