Privacy

Your calculations stay on your device

Every calculator runs as JavaScript in your browser. The numbers you type are never sent to a server, never logged, and never stored anywhere except, optionally, in the page URL so you can bookmark or share a result. There are no accounts and no login.

Analytics

We use Google Analytics 4 to understand which calculators are used and how the site performs, in aggregate. This sets cookies and collects standard measurement data such as pages viewed, approximate location, device type, and referring site. We do not sell personal information.

Advertising

This site may display ads from third-party ad networks to support its free operation. When enabled, those networks may use cookies or similar technologies to serve and measure ads. Visitors in regions that require a consent choice (such as the EEA and UK) will be asked for consent before non-essential cookies are set.

Your choices

You can block cookies in your browser settings, use an ad blocker, or opt out of personalized advertising at Google Ads Settings and optout.aboutads.info.

Contact

Questions about privacy: hello@watcharu.com.