Red Grid Tactical
OFFLINE-FIRST TACTICAL NAVIGATION
Military-grade navigation and team coordination tools that work where cell towers don't. Built for SAR teams, hunters, and anyone who operates beyond cell service.
Red Grid Link
Team Coordinator
BLE-based team sync with real-time position sharing, waypoint coordination, and after-action reports. PIN and QR sessions encrypt every payload with AES-256-GCM. Apple Multipeer Connectivity (iOS) and Google Play Services Nearby Connections (Android) run alongside BLE for higher-bandwidth peer transport. No cell towers, no servers.
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Red Grid MGRS
Solo Navigator
DAGR-class MGRS navigator with offline maps, Meshtastic mesh networking, 10 tactical tools, and 6 radio-ready reports. Zero tracking. Free on iOS.
Learn MoreSee what we've shipped and what's coming next for both apps.
Built For Teams In The Field
Search & Rescue
Assign sectors, track team members, mark clues, generate after-action reports. All without cell service.
Hunting
Know where your hunting party is. Share stand locations, track movement, coordinate without radio chatter.
Backcountry
Keep eyes on your hiking group without shouting distance. Share waypoints and track positions over Bluetooth.
Training
Run land navigation courses, set objectives, track performance, and review with detailed AARs.
How Field Link Works
Start a Session
Open Red Grid Link and create a Field Link session. No accounts, no configuration.
Teammates Appear
Anyone nearby with the app auto-discovers over Bluetooth. Encrypted positions sync in real time.
Coordinate
See your team on the map, share waypoints, set boundaries, and track movement. All offline.
The Technology Behind Red Grid
Field Link Protocol
Custom BLE on every platform with Apple Multipeer Connectivity (AWDL) on iOS and Google Play Services Nearby Connections on Android as a parallel transport. CRDT-based state management with delta-encoded updates under 200 bytes each.
Military-Grade Encryption
PIN and QR sessions wrap every payload in AES-256-GCM with ECDH P-256 session keys derived per session. Open mode auto-joins without encryption for training and demo use.
MGRS Navigation Engine
10-digit Military Grid Reference System precision. 1-meter accuracy. The same coordinate system used by NATO forces worldwide.
Offline Maps
MBTiles-based offline region downloads from OpenStreetMap or OpenTopoMap with throttling that respects the public-tile-server usage policy. Native USGS / Mapbox / MapTiler integrations are on the roadmap.
Zero Footprint Architecture
Red Grid apps collect no data. Your position never touches a server.
Get In Touch
Bug reports, feature requests, partnership inquiries, or just want to say hello.