Red Grid Link

Name: Red Grid Link
Author: Estus Holdings LLC

Android app by Estus Holdings LLC. Maps & Navigation · Estus Holdings LLC

Store rating: Unknown
Store rating count: Unknown
Download price: Free to download
In-app purchases: Listed by the store
Version: 1.7.0
Listing last refreshed: 2026-09-14

Store description excerpt

Your team. Your grid. No cell towers required. Inspired by military blue force tracking systems like ATAK, Red Grid Link brings encrypted team coordination to civilian and professional teams -- without cell towers, accounts, or servers. Track your team's positions in real time over Bluetooth, navigate with military-grade MGRS precision, and operate completely offline. Red Grid Link is an offline-first, MGRS-native coordination platform for small teams (2-8 people) operating beyond reliable cell service. It combines precision land navigation with Field Link -- zero-config proximity sync over Bluetooth (iOS Multipeer / Android Nearby). Lightweight where ATAK is complex. Cross-platform where ATAK is Android-only. Zero infrastructure where ATAK requires TAK Server. FIELD LINK -- TEAM SYNC WITHOUT INFRASTRUCTURE: Field Link is what sets Red Grid Link apart. Devices within proximity automatically discover each other and share encrypted position and marker data -- no internet, no configuration, no pairing codes. Just turn it on and your team appears on the map. - BLE proximity (iOS Multipeer/Android Nearby) transport (cross-platform) - AES-256-GCM encrypted sync with ECDH ephemeral session keys - Compact delta payloads (under 200 bytes per position update) - Tiered session security: Open (auto-join), PIN (4-digit), or QR code - Ghost markers: see last-known positions when teammates move out of range - Time-decay visualization: full opacity fades to outline over 30 minutes - Velocity vectors project teammate movement direction at disconnect - Snap-to-live animation on reconnect - Expedition Mode: under 3% battery per hour (BLE-only, 30-second updates) - Ultra Expedition Mode: under 2% battery per hour (BLE-only, 60-second updates) - Auto-reconnect with exponential backoff on disconnect MGRS-NATIVE NAVIGATION: Built on the proven MGRS engine from Red Grid MGRS -- the same coordinate system used by NATO forces worldwide. - Live MGRS coordinates (4/6/8/10-digit precision) - MGRS grid overlay on offline maps (GZD to 100m resolution) - Bearing, distance, and dead reckoning tools - Magnetic declination (WMM model) - NATO phonetic voice readout for hands-free grid calls 11 TACTICAL TOOLS: - Dead Reckoning plotter - Two-point Resection - Pace Count tracker - Bearing calculator with back azimuth - Coordinate Converter (MGRS, lat/lon, DMS, UTM) - Range Estimation (mil-relation formula) - Slope Calculator (percentage and angle) - ETA / Speed Calculator - Magnetic Declination converter - Celestial Navigation (sun/moon bearing reference) - MGRS Precision Reference OFFLINE MAP SYSTEM: - Downloadable map packs from USGS Topo and OpenTopoMap - Full offline operation -- maps cached locally as MBTiles - MGRS grid lines rendered as a dynamic overlay at all zoom levels 4 OPERATIONAL MODES: One engine, four presentation layers. Terminology, icons, and quick actions adapt to your mission: - Search & Rescue -- sector assignments, clue markers, search patterns - Backcoun

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