Privacy Policy

Short version

Calculations run entirely in your browser. The numbers you type never leave your device. We use privacy-respecting aggregate analytics to understand page-level traffic — nothing that identifies an individual visitor.

What we collect

• Calculator inputs: never. Every calculator evaluates its formulas in your browser via a sandboxed JavaScript engine. Values stay client-side; nothing is transmitted.
• Aggregate page analytics. We record page views, referrer, and a coarse country estimate (from your IP, not stored). No cookies, no cross-site tracking.
• Server logs. Our API logs request paths, status codes, and latency for operational monitoring. Logs are retained for 14 days.

Cookies

We use a single functional cookie — a session identifier for admin users. No advertising, no tracking, no cross-site cookies.

Third parties

We do not sell or share visitor data. Hosting is provided by Railway (API + database) and Vercel (static site delivery). Both process standard request metadata as part of delivering the service.

Your rights

Because we don't collect identifiable visitor data, there is no personal record to request or delete. If you believe we hold data about you (via an admin account, for example), email privacy@numora.net.

Changes

We'll update this page when the underlying practice changes. Material changes are summarized at the top with the revision date.