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.
api3.siftscience.com
operated by Sift Science, Inc. · classified as tracker · 1
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 — tracker
api3.siftscience.com belongs to Sift (Sift Science, Inc.), a third-party fraud-detection and risk-scoring vendor whose SDKs typically ingest device identifiers, account identifiers, and in-app behavioral/event data — i.e., device-fingerprinting-style collection, though its stated purpose is fraud prevention rather than ad targeting, so 'analytics' is a defensible alternative label. The app's declared sharing of Device or other IDs, App interactions, User IDs, Name, Email, and Phone number appears to cover this flow, so nothing here indicates an undisclosed data flow.
OpenAI — tracker
api3.siftscience.com is operated by Sift Science, a fraud-prevention and risk-analysis service that commonly processes device identifiers and user/activity signals. The app's label declares collection and sharing of relevant identifiers, interactions, and user information, so this contact is not clearly undisclosed.
Google Gemini — tracker
Sift Science provides fraud detection and risk prevention services by tracking device identifiers and user behavior. This contact appears disclosed because the app explicitly declares collecting and sharing device IDs, user IDs, and app interaction data.
Apps measured contacting this domain
| App | Label gap | Donations | Contacts | Seen |
|---|---|---|---|---|
| OpenTable | — | 4 | 8 | 2026-07-28 → 2026-07-29 |
| Claude by Anthropic | — | 3 | 3 | 2026-07-29 |
The corpus grows one report at a time: donate your App Privacy Report — anonymous by design.
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