Privacy

Effective 24 August 2026

The short version

Prism has no accounts, no logins, and no interest in who you are. Your progress belongs to your browser, not to a server.

What stays on your device

Settings (theme, motion, code language), prediction accuracy, and which algorithms you have opened or completed are stored in your browser's local storage and IndexedDB. They never leave your device. Clearing site data removes them completely; there is no copy anywhere else. The progress page has a reset button that does the same thing.

What is measured

Page views are counted with Cloudflare Web Analytics, which works without cookies, without fingerprinting, and without tracking you across sites. It tells us which pages are read; it cannot tell us who read them.

Advertising

Prism may show a small number of clearly separated adverts (Google AdSense) to cover its costs. If and where ads appear, they are placed manually, never near the visualization or its controls, and a consent notice is shown where the law requires one. Google's use of advertising cookies is described inGoogle's advertising policy; you can opt out of personalised advertising atGoogle Ads Settings. Until ads are enabled, no advertising code loads at all.

What is never collected

• No accounts, emails, or names.
• No cross-site tracking, no fingerprinting, no analytics cookies.
• No selling of data — there is no data to sell.

Questions

Write to contact. Corrections to this policy are published here.