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.
firebaseappcheck.googleapis.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 low — classification split: anthropic=unknown, openai=analytics, gemini=first-party. A human reviewed this domain's claims before anything here published.
Anthropic Claude — unknown
firebaseappcheck.googleapis.com is Google's Firebase App Check endpoint, used for app/device attestation and abuse prevention rather than analytics, advertising, or content delivery, so it does not map cleanly onto the available categories; note also that Waze is a Google subsidiary, making this arguably same-corporate-group infrastructure. Its expected data flow (attestation tokens, device/app identifiers, diagnostic signals) appears covered by the app's declared collection of Device IDs, User IDs, and Diagnostics, so nothing here indicates an undisclosed flow.
OpenAI — analytics
firebaseappcheck.googleapis.com is a Google Firebase App Check endpoint used to attest app integrity, rather than clearly indicating a separate tracking data flow. The provided privacy label already declares broad relevant collection and device-ID sharing, so undisclosed collection cannot be established from this contact alone.
Google Gemini — first-party
Firebase App Check is a Google security service used for app attestation and abuse prevention. Because Waze is owned by Google, this constitutes first-party backend infrastructure and aligns with disclosed diagnostic data collection.
Apps measured contacting this domain
| App | Label gap | Donations | Contacts | Seen |
|---|---|---|---|---|
| Waze | — | 7 | 47 | 2026-07-28 → 2026-07-30 |
com.fiverr.fiverr | — | 4 | 5 | 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 Tell us what to re-check — a misattributed domain, an outdated classification, a claim about your own app — and a human will review it.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.