Red Grid Link

Offline MGRS Nav & Team Sync

Only for iPhone

Free · In‑App Purchases · Designed for iPhone

iPhone

Lightweight ATAK alternative: encrypted Bluetooth team tracking + offline MGRS maps. No servers, no accounts. Built for SAR, hunting, and backcountry teams. Your team. Your grid. No cell towers required. 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 and WiFi Direct. No accounts. No servers. No complexity. 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. - BLE + WiFi Direct/AWDL proximity transport (cross-platform) - AES-256-GCM encrypted sync with ECDH ephemeral session keys - Compact delta payloads (under 200 bytes per update) - Tiered session security: Open, PIN, or QR code - Ghost markers and time-decay visualization - Expedition Mode: under 3% battery per hour - Auto-reconnect with exponential backoff 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 - Bearing, distance, and dead reckoning tools - Magnetic declination (WMM model) - NATO phonetic voice readout 11 TACTICAL TOOLS: Dead Reckoning, Resection, Pace Count, Bearing Calculator, Coordinate Converter, Range Estimation, Slope Calculator, ETA/Speed Calculator, Magnetic Declination, Celestial Navigation, MGRS Precision Reference. OFFLINE MAP SYSTEM: - Downloadable map packs from USGS Topo and OpenTopoMap - Full offline operation with MBTiles caching - MGRS grid overlay at all zoom levels 4 OPERATIONAL MODES: SAR, Backcountry, Hunting, Training -- terminology and icons adapt to your mission. 4 TACTICAL DISPLAY THEMES: Red Light (free), NVG Green (Pro), Day White (Pro), Blue Force (Pro). BUILT FOR THE FIELD: - Glove-friendly 44px+ touch targets - 3-tap maximum to any action - Haptic feedback and step detection - Background location with battery projections ZERO FOOTPRINT PRIVACY: No accounts, no cloud sync, no analytics, no ads, no tracking. Location data stays on your device. All Field Link communication encrypted with AES-256-GCM. SUBSCRIPTION TERMS: Red Grid Link offers auto-renewable subscriptions (Pro, Pro+Link, Team). Payment is charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. You can manage and cancel subscriptions in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://redgridtactical.github.io/RedGridLink/privacy.html

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The developer, Gianlorenzo Ranieri, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Location
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

  • Seller
    • Gianlorenzo Ranieri
  • Size
    • 45.1 MB
  • Category
    • Navigation
  • Compatibility
    Requires iOS 13.0 or later.
    • iPhone
      Requires iOS 13.0 or later.
    • iPod touch
      Requires iOS 13.0 or later.
    • Mac
      Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
  • Location
    • This app may use your location even when it isn’t open, which can decrease device battery life.
  • Languages
    • English
  • Age Rating
    4+
  • In-App Purchases
    Yes
    • Lifetime Pro+Link $99.99
    • Team Annual $199.99
    • Pro+Link Annual $44.99
    • Pro+Link Monthly $5.99
    • Pro Monthly $3.99
    • Pro Annual $29.99
    • Learn More
  • Copyright
    • © 2026 Red Grid Tactical
  • Developer Website
  • Privacy Policy

    • More by Gianlorenzo Ranieri