Privacy policy
Effective October 6, 2026 · Operated by Lumen Lab
What we collect
The calculator has no accounts and never sends the expressions or data you enter to a server. All calculations run in your browser.
What is stored on your device
So you can pick up where you left off, your browser’s localStorage keeps your settings (angle unit, number format), the variables A, B, C, D, M, x and y, the previous answer (Ans), your last 40 calculations, the values you entered on the statistics, equation, matrix and other screens, and whether you closed the language bar. This stays on your device; clear it with the calculator’s Clear history button or by clearing site data in your browser.
Ads and analytics
This site shows ads through Google AdSense. Google and other ad vendors use cookies to serve ads based on your visits to this and other websites. Because of these ads, third parties such as Google may place or read cookies in your browser and collect information through web beacons (tiny invisible images). See how Google uses information from sites that use its services. You can turn off personalized ads in Google Ad Settings; see how Google uses cookies in advertising. We don’t use separate analytics tools.
Server logs
The site is served by Cloudflare, which may briefly keep basic request logs such as IP addresses to operate the service securely.