Every soldier who's touched a DAGR (AN/PSN-13) knows the pain $2,500, weighs a pound, UI from 2003, and half the time you're fighting the device instead of navigating. I built Red Grid MGRS to put the same core land nav capabilities into a phone app.
What it does:
Live 10-digit MGRS grid
Dead reckoning, two-point resection, pace count, back azimuth
Magnetic declination (auto or manual)
Waypoint lists with bearing/distance and a wayfinder arrow
The military's DAGR (AN/PSN-13) costs $2,500 and runs a UI from 2003. Red Grid MGRS puts the same land nav in your pocket — live 10-digit MGRS, dead reckoning, resection, pace count, declination, waypoints, 6 radio report templates, and NATO voice readout. Built with React Native, fully offline, zero tracking. The algorithms are all public domain — one dev built this in months. Open source on GitHub.
