Your numbers stay with you.
Calculator inputs
The calculator does not send your inputs to the Python API or store them in cookies, local storage or a database. Inputs and a saved comparison remain in page memory while you use the page. A new page load starts with the example values.
Downloads and printing
When you choose CSV export, your browser creates a file containing your assumptions and results. Printing passes the page to your browser’s print dialog. You control where those exports go.
Page requests
Your browser requests the website’s HTML, styles and JavaScript from its host. Depending on the hosting configuration, infrastructure logs may include request metadata such as an IP address, timestamp and requested path. Financial input values are not included in those paths by this application.
Advertising and analytics
This version includes no advertising, donation checkout, analytics or third-party tracking scripts. Before introducing these services, this notice and any applicable consent controls will be updated to reflect what is actually used.