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.
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.
Where that data goes
HomeField contacts exactly two services, both run by OpenStreetMap. 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.
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.
Both are run by OpenStreetMap, an independent public mapping service with its own
privacy policy.
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.
Earlier beta builds (through v0.27.0) carried a last-resort Overpass mirror hosted
in Russia, used only if the main service was unreachable. It was removed in v0.28.0: a listing
coordinate should never reach a host we would not want to name here. The extension now requests
permission for the two hosts above and nothing else — you can verify this yourself on the
extension's details page in Chrome.
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.)
This website
The HomeField landing page 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.
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.
Changes & contact
If this policy changes, the date above changes with it. Questions or concerns:
yzhou30@gmail.com.