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Show HN: Red Grid Link – peer-to-peer team tracking over Bluetooth, no servers

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Why This Matters

Red Grid Link introduces a peer-to-peer team tracking system that operates entirely offline using Bluetooth and WiFi Direct, eliminating the need for servers or internet connectivity. This innovation enhances safety and coordination for small teams in remote or signal-degraded environments, making it highly valuable for military, emergency response, and outdoor activities. Its precise MGRS navigation and secure, low-power communication streamline team management in challenging conditions.

Key Takeaways

Red Grid Link

Offline MGRS navigation and proximity team coordination for small teams (2-8 people). No cell service needed.

Built on the MGRS engine from Red Grid MGRS. Field Link adds zero-config proximity sync over Bluetooth and WiFi Direct -- your team appears on the map the moment they're in range.

Available now on iOS. Android version coming soon.

Screenshots

Map & Team Grid View Field Link Ghost Markers

AAR Export Tactical Themes Tools Onboarding

Features

MGRS-Native Navigation

Live Military Grid Reference System coordinates with 1-meter precision. GPS Kalman filter for smooth, accurate position tracking. MGRS grid overlay on offline maps from GZD down to 100m resolution. Bearing, distance, dead reckoning, resection, pace count (with accelerometer step detection), declination, and coordinate conversion tools. NATO phonetic voice readout for hands-free grid calls.

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