Privacy Policy

The short version: the numbers you type into a calculator never leave your browser, we don't require accounts, and we don't sell or share personal data. Last updated: October 2026.

What we never collect

• Calculator inputs — loan amounts, salaries, birth dates, health measurements and similar values are computed locally in JavaScript and are never transmitted to our servers.
• Account or profile data — there are no accounts.
• Advertising or cross-site tracking cookies — we don't set any.

What is collected

• Standard server logs — like most websites, our hosting provider records requests (IP address, page, time) for security and operation.
• Aggregated page analytics — we use Vercel Analytics to count page views per URL (which pages are useful, which are not). It sets no cookies and does not track visitors across sites.

What is stored on your device

A small amount of data is kept in your browser's local storage: your color-theme preference and, if you use it, your recently-used calculators list. This data stays on your device and you can clear it at any time from your browser settings — your recently-used list also has a clear button on the homepage.

Changes & questions

If this policy changes materially, the updated date above will change with it. Any questions about your data can be sent via the contact page.