Hencob Sentinel

Sentinel is an Android app that screens incoming calls in real time and flags scams before they reach you or someone you love. Built on Android's CallScreeningService, it cross-references FTC complaint data with crowdsourced reports from other users, then scores each call with a confidence rating — no guesswork, no blanket blocking of unknown numbers. It's designed with seniors and families in mind, since they're disproportionately targeted by phone scams, but it works for anyone who's tired of answering "Hi, this is your car's extended warranty" for the tenth time this month. A few things that make it different: Confidence-weighted scoring instead of a static blocklist — it adapts as new scam patterns emerge Abuse-resistant reporting, so the crowdsourced data can't easily be gamed Runs on a lightweight Cloudflare Worker + D1 backend, so screening is fast and the app stays light