ZYRN TOPO

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Docs

Guides, the full feature list, and how everything works.

Read the docs

Get it on Android

Google Play · the best experience in the field.

Install App Download Beta APK

Everything you need, on the device

The essentials at a glance — the full feature list lives in the docs.

Offline maps

Save any area to the device — multi-GB safe, no eviction.

23 base layers

Topo, satellite, vector & street — stack and reorder.

3D terrain

Real DEM elevation in WebGL, offline after save.

GPS & tracks

Live location, heading-up, and track recording.

Trail routing

Snap-to-trail routes with off-route alerts.

Navigation

Bearing & distance to any point — no signal needed.

Markers

50 pin types, notes, colors, photo waypoints.

Draw & annotate

Lines, polygons, buffers, range rings, highlights.

Measure

Distance, area, bearing, elevation profiles.

Viewshed

Line-of-sight shading + radio-horizon mode.

Bearing Sight

Fullscreen compass HUD — shoot an azimuth to the map.

Slope & hazards

Slope angle/aspect, avalanche, wildfire, radar.

Team sync

P2P, LAN, Reticulum mesh, MAVLink, ATAK CoT.

SAR tools

Search periods, clues, team roster, gear lists.

Export & print

GeoJSON, GPX, KML, CSV, true-scale PDF.

Private by default

No account, no telemetry — data stays local.

See the full feature list