GridNav vs TacMap

Paste a grid. See it on the map in seconds. GridNav puts MGRS, UTM, and lat-lon on screen the moment GPS locks, and works with zero signal. Built for soldiers learning land navigation, ROTC and OCS candidates, search-and-rescue volunteers, wildland fire crews, law enforcement tactical teams, and backcountry hunters who need a grid to land on a map without fighting their phone. WHY GRIDNAV • Read your position at a glance. Current location in MGRS, UTM, and lat-lon, in large high-contrast type. Pick which formats show and in what order. Switch precision from 4 to 10 digits. • Drop a pasted grid onto the map in one step. Paste an MGRS string from radio chatter, a text, or a notebook. The pin lands, the bearing shows, the distance counts up from where you stand. • Navigate where there is no signal. Download regions ahead of time, choose your detail level, and move with full offline maps. OpenStreetMap and USGS topo built in. • Read the grid without squinting. Clean MGRS overlay with labels at every zoom level. Adjustable opacity so the map stays useful underneath. • Save a spot with one tap. Drop a waypoint at your current position. Add a label, pick a color, tap to navigate back. • Keep your eyes adjusted. Red on black night mode for long movements after dark. • Use it with one hand under stress. Big tap targets, low cognitive load, fast even with gloves on. Battery polling tuned for hours in the field. HOW IT WORKS 1. Open GridNav. Your current grid is on screen the moment GPS locks. 2. Paste a grid into the input bar. The pin drops and the bearing shows. 3. Move toward it. Switch coordinate formats with one tap when you need to call it in. WHO IT IS FOR Soldiers and cadets running land navigation courses. ROTC and OCS candidates preparing for nav tests. Search and rescue volunteers reporting grids back to coordinators. Wildland firefighters calling positions to dispatch. Hunters working public land where lat-lon and waypoints matter more than turn-by-turn. WHAT IT IS NOT Team chat, mesh networking, route collaboration, and tactical-platform creep stay out of the build. GridNav holds to one job: working a grid coordinate on a map, fast, with or without signal. PRICING Free to try. Drop up to three waypoints, read your live coordinates, paste grids, and inspect the map with no time limit. One-time purchase unlocks offline map downloads and unlimited waypoints. No subscription. Get GridNav. Then go.

TacMap is an offline map for the field: unlock once, with no subscription. No TacMap account, ads or behavioural analytics. Built for hiking, hunting, overlanding, search and rescue, surveying and MGRS navigation. MAPS WITHOUT A CONNECTION • Import PDF, GeoPDF and MBTiles maps and keep several to switch between. • GeoPDFs are placed in the sheet's own projection and datum, so the MGRS grid lines up with the printed grid. • Calibrate a plain PDF, including a scan or photo of a paper map saved as PDF, from three or more grid references (MGRS, UTM or latitude/longitude) and see how accurate each one is. • Maps stay sharp as you zoom in, and can be saved as offline tiles. • Use imported maps offline, without country restrictions. • Online basemaps, terrain elevation and weather are optional and require a connection. NAVIGATE AND PLAN • Read your position in MGRS, UTM or latitude/longitude. • Keep the map North Up or rotate it with your heading. • Measure distances, areas and bearings in degrees or NATO mils. • Add waypoints, draw lines and areas, and organise them into layers. • Use search-and-rescue, points-of-interest, airsoft and NATO APP-6 symbols. • Record your route and export GPX tracks. • See the elevation profile and line of sight along any line. Uses online lookups. • Red night mode protects your night vision. • Offline sun and moon times, and range rings around any symbol. WORK TOGETHER • Share drawings and symbols with your team over end-to-end encrypted Unit Sync. • Optionally share your callsign, position and heading with your unit. • Send encrypted text or reports to the room or a selected live unit with TacMap Chat. • Screen-off location sharing has a separate switch. Updates depend on the operating system and connection. • The relay cannot decrypt mission content, but sees admission, routing, session and control data, Chat recipients, IP addresses, timing and data size. “Routed” is not delivery or read proof; member status is relay-reported. YOUR DATA, YOUR TOOLS • Import and export GeoJSON, KML and KMZ, for QGIS, Google Earth and ATAK. • Export mission objects together; recorded tracks remain separate GPX files. • Mission data is encrypted in app-private storage. Imported maps remain in private, device-protected storage. • Online basemaps and lookups are off at first launch and can be enabled independently. While enabled, providers receive your IP address and requested map area, search query or coordinates. Coordinate and mission search stays on-device. • Optional Face ID or Touch ID app lock. For iPhone and iPad. ENGLISH AND GERMAN Choose English, German or Device language in Settings. Your own names, notes and messages remain unchanged. UNLOCK ONCE Try TacMap free for three days, then unlock with a one-time purchase. No subscription. The App Store shows your local price.