Privacy policy

Effective August 2026.

StatsLearn has no accounts, no sign-in, and no forms. We do not collect, store, or sell personal information. Calculator inputs and interactive states stay in your browser and are never sent to a server.

We use privacy-respecting analytics (Vercel Analytics and, if enabled, Google Analytics 4 configured with IP anonymization and ad personalization disabled) to count visits and see which pages help people. We also use first-party Learn Network analytics to measure page engagement, public route paths, safe action names, embed loads, a coarse device class and country, and external referrer or embed-parent hostnames. A random identifier groups events only within one browser tab and is stored in session storage. We do not store IP addresses, query strings, URL fragments, answers, scores, calculator inputs, assignment payloads, or personal information. Your theme preference (light or dark) is stored locally in your browser only.

The site links to external sites (for example, econlearn.org and collegeboard.org); their privacy practices are their own.

Questions: see the about page for contact details.