Privacy policy

Plain-language summary

• Every calculator runs entirely in your browser. The numbers you type are never transmitted to us.
• We do not require accounts, and we do not store your settings.
• We aim to keep third-party tracking at zero on tool pages. If this ever changes, it will be stated here first.

What we collect

Tool inputs: none. Calculations execute as client-side JavaScript; your sensitivity, DPI, screen size and mouse movement (DPI analyzer) stay on your device.

Contact emails: if you email us, we keep the message and your address to reply and to process any correction you report.

Server logs: our static host may record standard request logs (IP address, user agent, requested URL) as described below, for security and operations.

Hosting & logs

The site is served as static files. The hosting provider maintains short-lived standard access logs for security and abuse prevention. These logs are not used to profile visitors.

Cookies & analytics

Tool pages set no cookies for tracking. If we later adopt privacy-preserving, aggregate analytics, they will be cookie-free by design and this section will describe them before deployment.

Third parties

None on tool pages: no ad networks, no social embeds, no cross-site trackers.

Your rights & contact

For any privacy question or a deletion request regarding emails you sent us, contact [email protected]. If you are in the EU/UK, you have rights under GDPR; in California, under CCPA/CPRA. We honour equivalent requests from anywhere.