Red Grid Link – Encrypted Bluetooth team tracking without servers

Summary: Red Grid Link enables encrypted, serverless team tracking via Bluetooth Low Energy and WiFi Direct, using offline MGRS maps for navigation without cell service. It employs AES-256-GCM encryption with ECDH key exchange and CRDTs for decentralized state synchronization, ensuring no single point of failure.

What it does

The app tracks team members’ locations on offline MGRS maps by syncing position data over a mesh network using Bluetooth and WiFi Direct. It compresses updates to under 200 bytes and maintains secure, peer-to-peer communication without a host device.

Who it's for

It is designed for search and rescue, hunting, and backcountry teams needing reliable, offline team tracking without cellular or server dependencies.

Why it matters

Red Grid Link solves the problem of real-time team location sharing in environments without cell coverage or centralized infrastructure.