Privacy policy

Effective July 2026.

What we collect

This site uses a small, self-hosted analytics system. When you view a page or use a calculator we record: the page path, referrer, UTM campaign parameters if present, your browser's user-agent string, and a short-lived anonymous visitor identifier. Calculator events record which calculator was used and coarse inputs (e.g. a bill amount or project type) — never anything that identifies you.

What we don't do

No cookies. The site sets none — that's why there is no cookie banner.
No cross-site tracking. The anonymous visitor identifier is a one-way hash that changes every day and cannot be linked across days or across websites.
No third-party analytics. Data goes to our own server and nowhere else.
No selling or sharing of data. We have no advertisers or partners to share it with.

Data retention & contact

Aggregate statistics are kept to understand which pages are useful. You can ask questions about this policy at [email protected].

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