FieldNav: MGRS & UTM GPS

Know your exact grid position, save it, and find your way back — even with no signal, no account, and no subscription.

FieldNav is an offline MGRS and UTM GPS for land navigation beyond cell coverage. Read military grid (MGRS) and UTM coordinates, follow a compass with true magnetic declination, drop and find waypoints, build routes, and record tracks. Core navigation and your imported offline maps work with no signal.

Built for people who navigate off the pavement:

• Search & rescue, ground teams and first responders working on MGRS

• Soldiers, veterans, ROTC and land-navigation students

• Wildland firefighters, forestry and field crews

• Hunters, backcountry hikers and overlanders past cell coverage

• Airsoft, milsim, orienteering and geocaching

• HAM/SOTA radio operators and off-grid preppers

WHAT YOU GET

• Real MGRS / UTM grid drawn on the map, with grid lines and labels

• Compass with magnetic declination from the full WMM2025 model — true vs magnetic bearing, not a guess

• GPS averaging that shows RMS sample spread before you save a mark

• Waypoints in named groups, with symbols and colors

• Leg-by-leg routes with bearings, distance and arrival alerts

• Track recording with distance and DTG

• Offline maps — load your own MBTiles tile sets and navigate with no signal

• Import / export GPX, KML and CSV

• Ruler for instant distance and azimuth (degrees and mils)

• Datum support: WGS84, NAD27, OSGB36, AGD66, ED50

• Red night-vision mode that dims the map and the readouts

OFFLINE & PRIVATE BY DESIGN

Core navigation works fully offline. No accounts, no ads, no tracking, no analytics. Your marks, routes and tracks stay on the phone — FieldNav has no server to send them to. Online map tiles come from the map provider you pick, the same as in any map app; download your area and even that stops.

PAY ONCE

A single purchase unlocks every included feature. No subscriptions, no in-app purchases.

Know your grid. Trust your bearing. Find your way back.