EchoIn: On-device meeting echo and latency check

Detects mic/speaker echo and latency before calls so online meetings don't derail

Problem

In online meetings, echo and delay are often noticed mid-call, especially when switching between speaker and headset. Tools like local caption overlays emphasize offline privacy but don't check the audio chain. Users need a quick pre-join self-test rather than waiting for others to complain.

Solution

A local desktop utility that plays a test tone and records it, analyzes echo delay, noise floor, and clipping, shows a traffic-light result with device-switch suggestions. One-click check entry for common meeting apps.

Users

Knowledge workers in frequent online meetings, remote teams, podcast and live-stream beginners

MVP

macOS menu bar only; one-click tone playback and recording analysis; output echo delay in ms and noise score; headset/speaker switch suggestions; shareable result

Revenue

One-time purchase (e.g., $9.9), or free basic check + subscription for advanced device advice

Why now

Remote meetings are routine but audio self-checks remain a gap; on-device compute is cheap and system audio APIs make it feasible for indie developers