Privacy & cookie policy

Last updated: June 11, 2026. Plain version: this is a free calculator, and we collect as little as possible.

What we store on your device

The calculator runs entirely in your browser. We use a small amount of local storage to remember your cookie choice and your inputs. We do not set advertising or cross-site tracking cookies.

Cookie choices

When you first visit, we ask you to accept cookies or keep to essential-only. "Essential only" still allows the local storage needed to run the site and remember that choice. You can clear these any time from your browser settings.

The contact form

If you message us, we receive the name (optional), email, and message you submit, so we can reply and fix what you reported. We use that information only to respond to you; we don't sell it or add you to marketing lists.

Analytics

If we add privacy-respecting analytics in the future, we'll only load it after you accept cookies, and we'll update this page.

Third parties

Pricing shown here is published by Anthropic, OpenAI, and Google; we are not affiliated with them. Outbound links open their official documentation.

Contact

Questions about privacy? Use our contact form.