HOMEFIELD 氣場

CASE FILE / PRIVACY

PRIVACY RECORD / BETA

The route a listing takes.隱私

HomeField (氣場) is a browser extension that screens a real-estate listing's surroundings through the lens of feng-shui form. This policy explains, plainly, what it reads, where that goes, and what it never does.

THE SHORT VERSION · it reads public map data, and nothing about you is collected, profiled, or sold.

01 / INTAKE

ON YOUR ACTION

What it reads, and when

  • Only when you click to analyze a listing (or enter an address yourself), HomeField reads the property's address and/or map coordinates from the page you are viewing (Zillow, Redfin, or Realtor).
  • It uses those coordinates to query public map data — the surrounding roads, buildings, water, and landmarks — needed to produce the reading.
  • It does not read anything until you act. No background browsing history, no page content beyond the listing you asked about.

02 / ROUTE

TWO SERVICES

Where that data goes

HomeField contacts exactly two services. Both serve OpenStreetMap data, but they are run by two different organisations, and we name each one here rather than blur them together. This is the complete list — there is no third party, no analytics endpoint, and no server of ours:

  • If the listing page gives us no coordinates, the address is sent to Nominatim (nominatim.openstreetmap.org) to turn it into a latitude and longitude. If the page already carries coordinates, this step is skipped and the address is never sent anywhere. Nominatim is operated by the OpenStreetMap Foundation, under its own privacy policy.
  • The coordinates are sent to the Overpass API (overpass-api.de) to fetch the nearby roads, buildings, water and landmarks the reading needs. That request contains only the location being screened — no identifier of you. This is a public Overpass instance operated by FOSSGIS e.V., a German non-profit and OpenStreetMap's local chapter in Germany — not by the OpenStreetMap Foundation, so the Foundation's privacy policy does not govern it.
  • Both requests carry the extension's own identifier (its name and version), because both services' usage policies require a caller to be identifiable. That names the software, not you.
  • All analysis then runs locally in your browser. Readings are cached on your own device (about 30 days) so re-opening is instant; that cache never leaves your machine and you can clear it any time via the browser.

03 / ABSENCES

NOT COLLECTED

What we never collect

  • No accounts, names, emails, or logins.
  • No advertising, no third-party trackers, no fingerprinting, no sale of data.
  • No analytics inside the extension. (This website may count anonymous, cookie-free visits to gauge interest — see below.)

04 / READER

WEBSITE PATH

This website

The HomeField landing pages may use a privacy-first, cookie-free visit counter (e.g. GoatCounter) that records an anonymous page hit — no personal data, no cross-site tracking. It does not identify you.

The website also offers a reader (/read): paste a Zillow, Redfin, or Realtor listing link and it returns the same map-based reading without installing the extension. Because a web page cannot reach those map services directly, this one path runs through a small server of ours (a Cloudflare Worker):

  • The address in your link — or an address you type if the link has none — is the only thing sent. It goes to the same two services named above: Nominatim to geocode it, and the Overpass API for the surrounding map data.
  • If you paste a share / short link (for example redf.in), we follow it once — contacting the originating listing site — to expand it to the full address. Nothing else is sent there, and only that one link is followed.
  • We keep no accounts, no log of who asked, and no database. A finished reading is cached at the edge by address for about a day, so a repeated link is instant and the map services are spared — that cache holds the public reading, not you.
  • Nothing else leaves your browser: not your other tabs, not your browsing history.

05 / SCOPE

PERMISSIONS

Permissions

The extension requests only the host access needed to add its panel to the supported listing sites, and network access to the map service above. It requests nothing it does not use.

06 / RECORD

CHANGES & CONTACT

Changes & contact

If this policy changes, the date above changes with it. Questions or concerns: yzhou30@gmail.com.