Field notes from Red Grid Tactical: MGRS and land navigation deep dives, plus the engineering behind a zero-tracking GPS app.
Red Grid MGRS: offline MGRS navigator, 7-day free trial · App Store · Google Play
A step-by-step guide to reading an MGRS coordinate: the four parts of a grid reference, the read-right-then-up rule, how precision scales from 10 km down to 1 m, and how to pull a grid off a topographic map.
Convert MGRS to lat/long instantly with the free web tool, then learn the MGRS to UTM to lat/long pipeline, why the standard truncates to a square's southwest corner, and how to convert fully offline with no signal.
An honest buyer's guide to choosing an offline MGRS and land-navigation app. Six criteria to judge any app by, with a concrete way to test each one in the field, plus an honest accounting of where Red Grid MGRS lands.
How MGRS works, why militaries worldwide adopted it, and why it outperforms lat/long, UTM, What3Words, and Plus Codes for ground navigation.
The DAGR costs the DoD $2,500 per unit, and its core software functionality fits in ~15,000 lines of JavaScript. What that says about defense tech and software in general.
GPS dependence is a liability. The Army still teaches map and compass for a reason: here's what happens when the satellites go dark.
No analytics, no tracking, no crash reporting, not even a health check ping. The architecture behind a truly offline-first mobile app.
Red Grid MGRS puts a $2,500-class military GPS in your pocket: fully offline, zero accounts, zero tracking, location held in memory only. Built in collaboration with active-duty and retired U.S. Army soldiers.
7-day free trial on annual · $3.99/mo · $29.99/yr · $199.99 lifetime