Android · Kotlin · no internet
Signal Fire: Offline Mesh App Source Code
An emergency app that links nearby phones with no internet or cell service: chat, supplies board, place pins with a compass, medic beacon and sourced first aid. Plus why every choice was made.
- Phone-to-phone mesh over Bluetooth and Wi-Fi Direct
- Loop-proof relaying, hop limit, 48-hour expiry
- Mesh rules tested on simulated phones
- Build story: the reason behind every design choice
$39
Buy now · $39
Secure checkout by Stripe · card, Apple Pay, Google Pay, Cash App Pay · instant download, no account needed.


