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RedGridTacticalleft a comment
Please feel free to give this article I wrote a read to learn my experience and rational for building this! https://dev.to/redgridtactical/how-i-built-a-military-grade-gps-app-with-react-native-zero-cloud-zero-tracking-399-2klf
I built an app to replace the DAGR — $3.99 instead of $2,500
RedGridTacticalJoin the discussion
RedGridTacticalleft a comment
Hey everyone! I built Red Grid MGRS because the military's standard GPS navigator — the DAGR (AN/PSN-13) — costs $2,500, weighs a pound, and runs on a UI from 2003. Every soldier who's used one knows the frustration. What surprised me most is how little effort this took. The MGRS coordinate math, geodetic calculations, bearing/distance formulas — it's all public domain algorithms that have been...
Red Grid MGRS$3.99 app replacing the military's $2,500 DAGR GPS
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.
Red Grid MGRS$3.99 app replacing the military's $2,500 DAGR GPS
RedGridTacticalstarted a discussion
I built an app to replace the DAGR — $3.99 instead of $2,500
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)...