Topographic mapping with 3D terrain, slope-angle shading, GPS tracking, 10 no-key vector basemaps + 13 raster layers, 15 overlays, and PMTiles archives stored on your device. Team Sync across P2P, LAN, Reticulum mesh, and drone MAVLink — without a server, an account, or a subscription.
GARN TOPO is built for hikers, hunters, field crews, and search & rescue teams who need reliable maps beyond cell coverage — with tile caching, local storage, and multi-transport coordination that keeps working when connectivity drops.
Plan routes, track progress, mark camps and summits. Topo, satellite, and 3D terrain layers with auto tile caching for use without network connectivity.
Mark stands, blinds, water sources, and access points. BLM public lands and USFS Motor Vehicle Use Map overlays built in.
GPS tracking, coordinate formats (DD, DMS, DDM, UTM, MGRS), point elevation data, and on-device map storage for remote sites without connectivity.
Assign operational periods, draw lines and polygons, record tracks, and coordinate teams in real time via P2P, LAN, or radio — all without a signal.
Most mapping apps require constant connectivity and a subscription. GARN TOPO stores all map data on your device and is sold once, with no recurring fees.
Every byte lives on your device. Map tiles cache locally. Objects store in IndexedDB. PMTiles archives write to OPFS. Nothing is uploaded, nothing requires an account, and the core mapping experience works without a signal once your tiles are saved.
Buy once on Google Play and get the Android app and the web PWA — same build, same features. No tiers, no feature walls, no annual renewal. Every future update is included.
Team Sync runs over WebRTC P2P, local LAN WebSocket, Reticulum LoRa mesh, and MAVLink drone telemetry — with a full ATAK CoT bidirectional bridge. Multiple transports mean your team stays coordinated in any environment.
Locally cached maps, 3D terrain, GPS tracking, markers, lines, polygons, real-time Team Sync across 5 transports, and data management — all in one app, designed to work without network connectivity.
addProtocol('pmtiles') renderingvector_layers metadata.pmtiles files stored on devicekind: 'dem' — auto-used when 3D engages23 base layers organized by purpose — including ten no-key vector basemaps (OpenFreeMap + VersaTiles) — plus 15 overlays (now with on-device slope-angle shading), and a built-in browser of 1,345 worldwide imagery sources. Save any area — including 3D terrain DEM — as a .pmtiles file stored on-device: no eviction, no cache misses.
Plus 1,345 more sources from the OSM Editor Layer Index, filterable by country and type — added with one tap from the in-app Browse Imagery Catalog.
Deploy the same app on every device you carry into the field. No platform-specific feature differences.
Google Play, APK / AAB
Min Android 7 (API 24)
Any modern browser
PWA installable
Purchase once. Every platform, every feature, every future update — no subscription, no account, no cloud.
One purchase covers Android and the web PWA.
Works in Chrome, Firefox, Edge, and Safari. No sign-up required.
Hikers, hunters, field crews, search & rescue — wherever the map ends.
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