QuietPipe — spam call blocker that learns

Learn your blocking habits locally and cut spam calls with rules plus crowdsourced flags.

Problem

Carrier anti-spam portals offer only a few toggles and allow at most three custom prefixes, so many spam calls still get through and users end up blocking one by one. The longer a number has been in use, the more it leaks and the worse the spam gets.

Solution

An iOS/Android call filtering extension that maintains local allow and block lists with prefix, number-range, and time rules. One-tap flag after a call teaches the rules, with an optional anonymous crowdsourced number database, all local-first and exportable.

Users

Ordinary phone users harassed by spam calls, especially long-held numbers, dissatisfied with carrier options

MVP

Import local contacts as allow list; custom block rules by prefix and range; one-tap flag after call; blocked-call stats; exportable rules

Revenue

Free basic blocking; subscription for crowdsourced updates, multi-number sync, and advanced rules

Why now

Carrier solutions are limited and opaque, both iOS and Android expose call filtering extensions, and user demand for privacy and control is rising