GitHub Repository

DAGR-class MGRS navigator for iOS and Android — live 10-digit grid coordinates, 10 tactical tools, offline maps, Meshtastic mesh networking, 6 radio-ready report templates. Open source. No tracking. Free on the App Store and Google Play.

11 starsJavaScript

Red Grid MGRS – Open-Source DAGR-Class GPS Navigator for iPhone

Name: Red Grid MGRS – Open-Source DAGR-Class GPS Navigator for iPhone
Availability: InStock
Author: redgridtactical

by redgridtactical·Mar 15, 2026·2 points·1 comment

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AI Analysis

●●●BangerNiche GemDark HorseSolve My Problem

Replaces $2,500 DAGR hardware with free open-source iPhone app.

Strengths

•10-digit MGRS precision with 1-meter resolution fully offline.
•Six radio-ready templates: SALUTE, 9-Line MEDEVAC, SPOT reports.
•Zero tracking, location data never leaves device memory.

Weaknesses

•iOS-only, Android version marked as coming soon.
•Niche audience limits broader developer appeal.

Post Description

The military's DAGR GPS receiver costs $2,500 and weighs a pound. I built an open-source alternative that runs on your iPhone — live 10-digit MGRS coordinates, magnetic declination, waypoint navigation, 8 tactical tools, and 6 radio-ready report templates (SALUTE, 9-Line MEDEVAC, SPOT).

React Native / Expo, ~15k lines of JS, fully offline, zero tracking. Location data never leaves memory.

Free on the App Store with an optional $9.99 Pro upgrade. Would love feedback on the UX, the MGRS math, or anything else — still actively developing.