Early Echo for Android

Two phones that hear a fire by timing sound through the warm air between them.

1. Download it on both phones.
2. If Android asks, let your browser install apps.
3. Put both phones on the same Wi-Fi or hotspot and open Early Echo on each.

A test build for Android 11 and newer, 13 November 2026. About the project: early-echo.dev.obayy.dev