ZYRN TOPO
Free in your browser — no install, no account.
Open the appGuides, the full feature list, and how everything works.
Read the docsGoogle Play · the best experience in the field.
Install App Download Beta APKZYRN TOPO puts professional-grade topographic navigation in your pocket — every map saved to the device, every tool built for the field, and nothing phoning home. No account. No subscription. No signal required.
Draw a box, tap save, and the whole area lives on your phone — the basemap, your overlays, even the 3D terrain. Storage-safe by design: your maps are never silently evicted.
Spin the map in real 3D, shade every slope by angle or aspect, check what's visible from a ridgeline, and print a true-scale PDF map sheet for your pack — the tools professionals reach for, without the subscription.
Share live positions, markers and tracks over the internet, your LAN, or an off-grid Reticulum mesh — and bridge straight into ATAK. Search periods, clue logs and gear lists come standard for SAR crews.
The essentials at a glance — the full feature list lives in the docs.
Save any area to the device — multi-GB safe, no eviction.
Topo, satellite, vector & street — stack and reorder.
Real DEM elevation in WebGL, offline after save.
Live location, heading-up, and track recording.
Snap-to-trail routes with off-route alerts.
Bearing & distance to any point — no signal needed.
50 pin types, notes, colors, photo waypoints.
Lines, polygons, buffers, range rings, highlights.
Distance, area, bearing, elevation profiles.
Line-of-sight shading + radio-horizon mode.
Fullscreen compass HUD — shoot an azimuth to the map.
Slope angle/aspect, avalanche, wildfire, radar.
P2P, LAN, Reticulum mesh, MAVLink, ATAK CoT.
Search periods, clues, team roster, gear lists.
GeoJSON, GPX, KML, CSV, true-scale PDF.
No account, no telemetry — data stays local.
Install it on Android, or open it in your browser right now — either way, you're navigating in under a minute.