# Red Grid Link > ATAK alternative: encrypted Bluetooth team GPS tracker for SAR & hunting Canonical page: [https://chrome-stats.com/d/com.redgrid.red\_grid\_link](https://chrome-stats.com/d/com.redgrid.red_grid_link) ## Overview - **ID:** `com.redgrid.red_grid_link` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** Estus Holdings LLC - **Category:** MAPS\_AND\_NAVIGATION - **Downloads:** 44 - **Version:** 1.7.0 - **Last updated:** 2026-08-20 - **First published:** 2026-04-20 - **Publisher country:** US - **Size:** 33 MB - **Data as of:** 2026-09-09 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.redgrid.red_grid_link) - **Website:** [https://redgridtactical.com](https://redgridtactical.com/) - **Privacy policy:** [https://redgridtactical.com/privacy.html](https://redgridtactical.com/privacy.html) ## Description 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
- Backcountry -- camp, waypoint, and trail navigation
- Hunting -- stand locations, game sightings, property boundaries
- Training -- exercise objectives, rally points, phase lines

AFTER-ACTION REPORTS:
One-tap PDF export containing map snapshot, mission timeline, track data, timestamps, team roster, markers, and session log.

4 TACTICAL DISPLAY THEMES:
- Red Light: preserve night-adapted vision (free)
- NVG Green: night observation device compatibility (Pro)
- Day White: high-contrast for daylight (Pro)
- Blue Force: tactical blue display (Pro)

BUILT FOR THE FIELD:
- Glove-friendly UI with 44px+ minimum touch targets
- 3-tap maximum to any primary action
- Haptic feedback on key interactions
- Accelerometer-based step detection for hands-free pace counting
- Landscape and portrait support
- Background location updates with battery drain projection

ZERO FOOTPRINT PRIVACY:
- No accounts. No sign-up. No login.
- No cloud sync. No analytics. No tracking.
- No ads. No third-party data SDKs. ## Rankings - #2,291,868 — Overall ## Permissions and access ### Permissions - `android.permission.ACCESS_BACKGROUND_LOCATION` - `android.permission.ACCESS_COARSE_LOCATION` - `android.permission.ACCESS_FINE_LOCATION` - `android.permission.ACCESS_NETWORK_STATE` - `android.permission.ACCESS_WIFI_STATE` - `android.permission.BLUETOOTH_ADVERTISE` - `android.permission.BLUETOOTH_CONNECT` - `android.permission.BLUETOOTH_SCAN` - `android.permission.CAMERA` - `android.permission.CHANGE_WIFI_STATE` - `android.permission.FOREGROUND_SERVICE` - `android.permission.FOREGROUND_SERVICE_CONNECTED_DEVICE` - `android.permission.INTERNET` - `android.permission.NEARBY_WIFI_DEVICES` - `android.permission.WAKE_LOCK` - `com.android.vending.BILLING` - `com.android.vending.CHECK_LICENSE` - `com.redgrid.red_grid_link.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` ## Similar extensions and apps - [Red Grid MGRS](https://chrome-stats.com/d/com.redgrid.redgridtactical) — 354 users - [AdventureLink](https://chrome-stats.com/d/com.inmotion.adventurelink.mobile) — 324 users - [Acre Tracker](https://chrome-stats.com/d/com.vigsecdrone.acre.tracker) — 152 users - [Teammap - GPS team tracking](https://chrome-stats.com/d/com.teammap.app) — 16 users - [TerraField](https://chrome-stats.com/d/com.terrafield.app) — 27 users - [Real-Time GPS Tracker 2](https://chrome-stats.com/d/com.greenalp.realtimetracker2) — 961,872 users, 4.49 / 5 - [ForceTracker](https://chrome-stats.com/d/eu.forcetracker.android) — 9 users - [TAK Lite](https://chrome-stats.com/d/com.taklite.client) — 15 users - [RedGps Tracker](https://chrome-stats.com/d/com.app.tracker.red) — 12,228 users - [TacLink](https://chrome-stats.com/d/com.taclink.app) - [GroupRadar](https://chrome-stats.com/d/com.groupfinder.app) — 13 users - [Terra Scout](https://chrome-stats.com/d/com.goterrascout.app) — 8 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.redgrid.red_grid_link)