The military's DAGR costs $2,500 and weighs a pound. Red Grid MGRS puts the same core land navigation capabilities in your pocket for free. Offline maps, Meshtastic mesh networking, 10 tactical tools. Zero tracking.
4/6/8/10-digit precision. 1-meter resolution. Tap to copy any grid to clipboard.
WMM 2025 model (same as DoD). Auto-calculate or manual offset.
Save positions. Get bearing, distance, and a compass-relative arrow to any waypoint.
Back azimuth, dead reckoning, magnetic declination, resection, pace count, TDS, sun/moon, precision selector, elevation/slope, photo geostamp.
SALUTE, 9-Line MEDEVAC, SPOT, CASEVAC, ICS 201, CFF. Fill and copy, radio-ready.
Download tiles for your AO. Three styles: standard, dark tactical, and topographic with contour lines. Zero-network map use. Pro feature.
Share your grid position over LoRa mesh via BLE. See other mesh users' coordinates, bearing, and distance. No cell service needed. Pro feature.
No analytics. No tracking. No accounts. GPS coordinates never leave your device.
Burn MGRS grid + DTG onto any photo. Evidence-grade location proof, no metadata stripping. Pro feature.
Hear your grid in NATO phonetics. Shake to speak for hands-free position readout. Pro feature.
Garmin GLO, Bad Elf, and other BLE GPS receivers for enhanced accuracy. Pro feature.
Route overlay on map, leg distances, nearest-neighbor optimization. GPX/KML import and export. Pro feature.
Haptic feedback when crossing MGRS grid boundaries. 100m and 1km alerts. Pro feature.
Open-source What3Words alternative. Share locations as memorable phrases. Patent-free. Pro feature.
Full in-app localization: 15 languages (English, French, German, Spanish, Japanese, Korean, Italian, Dutch, Brazilian Portuguese, Russian, Simplified Chinese, Traditional Chinese, Turkish, Polish, Arabic, Hindi).
| Feature | Red Grid MGRS | DAGR (AN/PSN-13) | Tactical NAV | MilGPS |
|---|---|---|---|---|
| Price | Free | $2,500 | $4.99+ | $4.99 |
| Live MGRS | ✓ | ✓ | ✓ | ✓ |
| Magnetic Declination | ✓ WMM 2025 | ✓ | ✓ | ✗ |
| Report Templates | ✓ 6 types | ✗ | ✗ | ✗ |
| Open Source | ✓ | ✗ | ✗ | ✗ |
| Zero Network / Tracking | ✓ Verified | ✓ | Unknown | Unknown |
| Tactical Tools | ✓ 10 tools | Limited | Some | Basic |
| Offline Maps | ✓ Tile download | ✗ | ✗ | ✗ |
| Mesh Networking | ✓ Meshtastic | ✗ | ✗ | ✗ |
| External GPS | ✓ BLE | ✗ | ✗ | ✗ |
| GPX/KML Import/Export | ✓ | ✗ | ✓ | ✗ |
| Mission Planning | ✓ | ✗ | ✗ | ✗ |
| Weighs | 0 lbs (your phone) | 1.0 lb | 0 lbs | 0 lbs |
Red Grid MGRS makes zero HTTP requests during normal operation. Your position data exists in memory only.
Read: How the zero-network architecture works →Submitted for review April 24 on both iOS and Google Play. Tap any waypoint pin on the map to see its details and remove it. Android runtime rebuilt on Expo SDK 53 / RN 0.79.6 with 16 KB page-size alignment for Android 15+. Works on both plans.
Live since April 20. In-app review prompt now appears at natural moments (right after a successful MARK POSITION) instead of random launches. Background tuning and stability polish across the grid, map, and tools.
Camera-based target acquisition. Encrypted mesh channels. Apple Watch. CoT for ATAK. Route planning with elevation. Bundles the Expo SDK 53 upgrade that unblocks Android 16 KB compliance.
Offline voice commands. Inertial navigation (GPS-denied). Satellite position reporting. Custom report templates. Sensor fusion.
For training, STXs, ruck marches, and permissive GPS environments: yes. The DAGR's SAASM module matters in contested environments, but for the other 90% of use, Red Grid MGRS delivers the same core land nav capabilities.
Yes. The app uses your phone's GPS receiver, which communicates directly with satellites. No cell tower, no Wi-Fi, no internet required. Works in airplane mode.
None. Zero analytics, zero tracking, zero crash reporting. GPS coordinates exist in memory only. Read the source code to verify.
MGRS is built on UTM but adds a grid zone designator and 100km square identification. Red Grid MGRS shows both formats (Pro feature), plus decimal degrees and DMS.
Red Grid MGRS uses the DMA (Defense Mapping Agency) MGRS algorithm with the Vincenty formula for bearing/distance calculations (sub-millimeter accuracy on the WGS84 ellipsoid). The same math the DAGR uses. GPS accuracy depends on your phone's receiver chip and satellite geometry.
The app is free to download. Pro unlock is available as $3.99/month, $29.99/year (best value), or $149.99 lifetime (one-time, own forever).
Meshtastic is open-source firmware for LoRa radios that creates off-grid mesh networks. Red Grid MGRS connects to a Meshtastic radio via Bluetooth LE to share your grid position with other mesh users. You need a Meshtastic-compatible radio (~$20-40) to use mesh features. Without one, all other features work normally.
Yes. Red Grid MGRS is live on Google Play as of April 2026. Same features, same zero-network architecture, same pricing. Android 7+ (API 24+) — phones and tablets.