Red Grid Link
V1.3 — Team FeaturesEncrypted team coordination over Bluetooth. No cell towers. No servers. No accounts.
What Red Grid Link Does
Field Link — Encrypted Team Sync
Auto-discover teammates via BLE + WiFi Direct. AES-256-GCM encrypted with ECDH ephemeral keys. No servers, no pairing, no configuration. Sync positions with 2-8 team members in real time.
Offline MGRS Maps
Download USGS Topo and OpenTopoMap regions. MGRS grid overlay at all zoom levels. Full offline operation with MBTiles. Never depend on cell service for maps.
11 Tactical Tools
Dead reckoning, two-point resection, pace count, bearing/back azimuth, coordinate converter, range estimation, slope calculator, ETA/speed, declination, celestial nav, MGRS reference.
Team Roles & Coordination
Assign Lead, Scout, Medic, Comms, or custom roles with callsigns. Share waypoints, draw boundaries, get alerts when teammates cross the geofence.
Ghost Markers & Time-Decay
When teammates go out of range, their last-known position stays on your map. Opacity fades over 30 minutes with projected heading vectors.
4 Operational Modes
SAR, Backcountry, Hunting, Training. UI adapts terminology, icons, and quick actions to your mission context.
New in V1.3 — Team Features
Team Roles
Assign Lead, Scout, Medic, Comms, or custom roles with callsigns for every team member.
Waypoint Sharing
Save waypoints to your personal list or share them with your entire team in one tap.
Shared Annotations
Tap-to-place shared annotations on the map with 6 colors and undo support.
Boundary Alerts
Draw geofence boundaries on the map. Get notified when any team member crosses the line.
NATO Voice Callouts
Automatic text-to-speech with correct NATO phonetic digit pronunciations for hands-free operation.
Session Export/Import
Export complete sessions as versioned JSON. Import on another device to review or continue.
Enhanced AARs
After-Action Reports now include team roster, per-member track summary, and boundary events.
New Marker Categories
Hazard, objective, cache, rally point, and more. Categorize markers for clearer situational awareness.
Red Grid Link vs. The Competition
| Feature | Red Grid Link | ATAK | goTenna | Garmin inReach | Meshtastic |
|---|---|---|---|---|---|
| Price | Free / $5.99/mo | Free | $99+ device | $299+ device | $30+ device |
| Server required | No | TAK Server | No | Garmin cloud | No |
| iOS + Android | Both | Android only | Both | Both | Android only |
| Encryption | AES-256-GCM + ECDH | TLS | AES-256 | Proprietary | AES-256 |
| MGRS native | Yes | Yes | No | No | No |
| Offline maps | MBTiles download | Yes | No | Basic | No |
| Max team size | 8 devices | Unlimited | Varies | Unlimited | Varies |
| Accounts required | None | Yes | Yes | Yes | None |
| Additional hardware | Phone only | Phone only | goTenna device | inReach device | LoRa radio |
Built For All-Day Operations
<5%
battery/hr
Active Mode
5-second position updates
<3%
battery/hr
Expedition Mode
30-second position updates
<2%
battery/hr
Ultra Expedition
60-second position updates
Pricing
- All 4 operational modes
- 2-device Field Link
- 1 offline map region
- 11 tactical tools
- Red Light theme
- All 4 themes
- Unlimited map downloads
- After-Action Reports
- 2-device Field Link
- Everything in Pro Monthly
- Best value subscription
- All Pro features forever
- 8-device Field Link
- All future updates
- No subscription ever
Enterprise & Teams
Need multi-seat licensing, source access, or priority support for your organization?
Contact UsFrequently Asked Questions
How does Field Link work?
Field Link uses Bluetooth Low Energy and WiFi Direct to auto-discover nearby teammates and share encrypted position data. No pairing, no configuration needed. AES-256-GCM encryption with ECDH P-256 ephemeral session keys means new cryptographic keys are generated for every session. Data syncs peer-to-peer with no servers involved.
Does it work without cell service?
Yes. Red Grid Link uses GPS satellites for positioning and Bluetooth for team sync. No cell towers, no WiFi, no internet connection required. Download your map regions over WiFi before heading out and you have full offline operation with MGRS grid overlay, all 11 tools, and team coordination.
What data do you collect?
None. No accounts, no analytics, no cloud sync, no tracking. Your location data never leaves your device. Field Link session data is ephemeral and disappears when the session ends. We have no servers to store data on even if we wanted to.
How is this different from ATAK?
Red Grid Link is a lightweight ATAK alternative built for civilian teams. It works on both iOS and Android (ATAK is Android-only), requires no TAK Server infrastructure, sets up in 30 seconds, and is designed for SAR, hunting, and backcountry teams rather than military operations. No IT department required.
Can I use it for hunting?
Absolutely. Hunting mode adapts the UI with hunting-specific terminology, icons, and quick actions. Track every member of your hunting party on the map, share stand locations, mark game trails, and coordinate without radio chatter. All over encrypted Bluetooth.
When is Android coming?
Android is in closed beta right now. You can join the Android beta on Google Play and start testing today. Full public launch is coming soon.
How far does Bluetooth reach?
Standard BLE range is 100-300 meters depending on terrain, obstacles, and device hardware. BLE Long Range mode is coming in V1.4, which will extend the effective range to 400 meters to 1 kilometer in open terrain.
What are Ghost Markers?
When a teammate moves out of Bluetooth range, their last-known position stays on your map as a Ghost Marker. The marker's opacity gradually fades over 30 minutes so you can tell how stale the data is. A projected heading vector shows their likely direction of travel based on their last movement.
Ready to coordinate?
Download Red Grid Link and get your team on the map in 30 seconds.