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.
gtp-app-dot-b-ppc-app-prod-u2xv6z.ew.r.appspot.com
classified as unknown · 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 medium — classification split: anthropic=unknown, openai=unknown, gemini=first-party. A human reviewed this domain's claims before anything here published.
Anthropic Claude — unknown
appspot.com is Google App Engine shared hosting, so the domain identifies a cloud-hosted project rather than an owner; the project name fragment "b-ppc-app-prod" hints at a Booking-operated (possibly PPC/marketing-related) backend, but I cannot verify who controls this instance. Because the endpoint's purpose and data flow are indeterminate, and Booking's label already covers broad collection including device IDs and app interactions, there is no basis to call this undisclosed.
OpenAI — unknown
The r.appspot.com host indicates a Google App Engine deployment, but the specific service and its owner or purpose cannot be determined from the provided information. The declared label already covers broad device, interaction, diagnostic, and other-information collection, so undisclosed data flow cannot be established.
Google Gemini — first-party
The domain is a Google App Engine endpoint (`appspot.com`) hosting backend infrastructure for Booking.com (`b-ppc-app-prod`). This appears to be first-party app traffic, and there is no evidence of undisclosed data collection.
Apps measured contacting this domain
| App | Label gap | Donations | Contacts | Seen |
|---|---|---|---|---|
| Booking.com: Hotels & Travel | — | 4 | 20 | 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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