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.
mobileone.americanexpress.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
mobileone.americanexpress.com is a subdomain of americanexpress.com, the app publisher's own domain, so it is a first-party endpoint (likely the mobile API backend) rather than a third-party tracker. The declared collection of payment info, account details, and identifiers covers this flow, so nothing here appears undisclosed.
OpenAI — first-party
The domain is under americanexpress.com and most likely serves Amex's own mobile service infrastructure. The label declares broad collection categories, so the contact alone does not establish an undeclared data flow.
Google Gemini — first-party
The contacted domain mobileone.americanexpress.com belongs directly to American Express, the developer of the Amex app. As a first-party communication endpoint, this domain contact does not indicate an undisclosed data flow.
Apps measured contacting this domain
| App | Label gap | Donations | Contacts | Seen |
|---|---|---|---|---|
| Amex | — | 7 | 64 | 2026-07-28 → 2026-07-30 |
The corpus grows one report at a time: donate your App Privacy Report — anonymous by design.
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