Privacy and data choices
The calculator works without optional analytics. Basic server totals count page requests without a visitor identifier. Optional usage analytics and detailed research are separate choices, off by default, and can be withdrawn from the calculator. Feedback is private and simulation details are attached only when selected.
Retention
Optional usage events and detailed snapshots are kept for 30 days. Restricted encrypted IP records are kept for at most 7 days, daily request totals for 24 months, and admin audit records for 90 days. Feedback remains private; optional contact and attached simulation data are removed 90 days after closure.
Purpose and processors
Railway hosts the site and database. Cloudflare Turnstile is loaded only when the feedback form opens. Data is used to operate the service, prevent abuse, answer feedback and—only after the relevant choice—understand product use or detailed simulations. It is not shared with advertisers.
Contact
Contact the operator through the private feedback form on the calculator.