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.
mobile-apps.booking.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
mobile-apps.booking.com is a subdomain of booking.com, the app's own publisher domain, so this is first-party app backend traffic rather than a third-party tracker. The app's label already declares extensive first-party collection (identifiers, app interactions, diagnostics), so nothing here implies an undeclared data flow.
OpenAI — first-party
The domain is a booking.com subdomain and most likely serves Booking.com’s own mobile app infrastructure. The app’s label declares broad collection categories including identifiers, app interactions, diagnostics, and user information, so this contact is not clearly an undeclared data flow.
Google Gemini — first-party
The contacted domain mobile-apps.booking.com belongs to the first-party domain booking.com, matching the app's developer and bundle ID. Contacting a first-party service endpoint for normal app operation does not indicate an undisclosed data flow.
Apps measured contacting this domain
| App | Label gap | Donations | Contacts | Seen |
|---|---|---|---|---|
| Booking.com: Hotels & Travel | — | 4 | 16 | 2026-07-28 → 2026-07-29 |
The corpus grows one report at a time: donate your App Privacy Report — anonymous by design.
Think something here is wrong?
Evidence and research improve when people push back. Tell us what to re-check — a misattributed domain, an outdated classification, a claim about your own app — and a human will review it. Responses can take up to 30 days.