This page aggregates measured, corroborated evidence: donors' iPhones recorded apps contacting this domain, every claim below was reported by separate accepted donations and published under a human verdict (later rows for an approved app inherit its verdict). A contact is a measurement, not an accusation — it does not show what data was sent.
ontology.health.apple.com
classified as first-party · 2
What our research panel found AI-drafted · human-reviewed
We ask several independent AI models the same question and publish their answers separately — cross-vendor agreement is evidence against fabrication, and disagreement is worth seeing. 3 of 3 models answered, overall confidence high. A human reviewed this domain's claims before anything here published.
Anthropic Claude — first-party
ontology.health.apple.com is a subdomain of apple.com contacted by Apple's own Health app (com.apple.Health), so it is a first-party endpoint — the name suggests fetching health terminology/ontology reference data rather than a third-party tracking service, though I have no independent source on this specific host's function. A first-party call of this kind does not by itself imply a data flow beyond the app's declared (empty) label, so I would not flag it as undisclosed on the evidence given.
OpenAI — first-party
The domain is under apple.com and is likely an Apple-operated Health ontology service. No evidence provided establishes collection or sharing of personal data beyond the app's privacy label.
Google Gemini — first-party
ontology.health.apple.com is a first-party domain owned by Apple used to support health data features and medical ontology in the Apple Health app. First-party functional network requests do not inherently imply an undisclosed data flow.
Apps measured contacting this domain
| App | Label gap | Donations | Contacts | Seen |
|---|---|---|---|---|
com.apple.Health | — | 4 | 42 | 2026-07-28 → 2026-07-29 |
The corpus grows one report at a time: donate your App Privacy Report — anonymous by design.
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