The short version: we don't track you

• No accounts, no cookies, no ads, no analytics scripts, no trackers. Fonts are served from this site, not from a third party.
• Our host sees basic request data. Sniffcast runs on Cloudflare Pages. Like any web host, Cloudflare processes your IP address and request details to deliver the page and protect it from abuse, and may give us aggregate traffic counts. See Cloudflare's privacy policy.
• The symptom decoder runs entirely in your browser. What you tap is never sent anywhere.
• Sharing uses your phone's own share sheet or clipboard. We don't see what you share or with whom.
• Tips, once the tip jar opens, go through the payment service you choose (Stripe, Buy Me a Coffee, Ko-fi or Venmo), under that service's privacy policy. We never see card details.

The health data we show is public, aggregate wastewater data. It contains no information about any individual.

Last updated October 2026.