Rambler is a complete mapping and GPS field toolset that runs entirely on your device. No account. No subscription. No ads.

Rambler covers the complete field workflow: research, planning, execution, recording, analysing, secure export and sharing.

· Hikers and wild campers: offline 3D maps, trail-based route planning, private location recording, on-device data (elevation & speed) analysis.
· Detectorists: precise GPS pinning, encrypted export, no cloud.
· Field researchers, archaeologists and heritage surveyors: detailed measurements, professional GPS data collection and media recording without enterprise pricing.
· Green-laners: OSM routing that follows lanes, not roads.
· Cyclists: touring routes via actual cycle paths and bridleways, interactive speed and elevation graphs.

━━━ WHAT IT DOES ━━━

REAL-TIME 3D MAP RENDERING
On-GPU terrain rendering with user-configurable elevation gradients, hillshading, slope aspect and contour lines.

· Raw elevation data rendered and analysed dynamically on-device.
· Not built on a third-party map vendor.
· Configurable tile sources from any open provider.

PLANNING
Trail planning with indexed waypoints. Any custom or search result map pin can be added as a waypoint and reordered.

Automatic routing via OpenRouteService respects footpaths, bridleways, green lanes and terrain-appropriate paths. Geodesic measurement with 3D surface distance, elevation analysis, and interactive elevation graphs.

IN THE FIELD
Continuous background GPS track recording. Geotagged photos, video, audio and text notes.
Live compass and bearing to any selected pin. OS Grid, UTM and standard coordinate formats.
Offline map access. Once cached, always available. A lost connection never stops the tool from working.

ANALYSIS TOOLS
Complete GPS track and route analysis entirely on-device.

Geodesic, surface, and straight-line distance, elevation gain and loss, speed over distance.

HOLOGRAPHIC MAP PROJECTION
Uses AR surface tracking to project the full 3D interactive map onto any surface.

Lock it in space or place it on a table, a rock, the ground. Walk around it. Correlate what you see on the map with what you see in the field.

CELESTIAL RENDERING
Live star catalogue, constellations, and real-time sun, moon and planet positions for any location on earth.

━━━ DATA AND PRIVACY ━━━

Everything stays on your device. No account. No data uploaded. Export is AES-256-CBC password encrypted when you need it.

Map data from OpenStreetMap. Routing from OpenRouteService. All open sources, cached locally. Not Mapbox. Not a Google Maps wrapper. The data layer is open and beholden to no one.

━━━ WHAT RAMBLER IS NOT ━━━

Not a trails platform. No curated routes or user reviews.
Not a social platform. No feed, no followers, no leaderboards.
Not a subscription. Bought once, yours permanently.
Not a fitness tracker. GPS recording is a field record, not a workout log.

━━━ PRICING ━━━

Rambler is free because nobody should rent a map.

A one-time purchase unlocks data export, GPX archives, encrypted Ramble files, and removes the watermark from photos and video. No subscription. No renewal. No expiry.

━━━ ABOUT ━━━

Rambler is a solo project built by one developer for people who take the field seriously. Built for a friend who hated subscriptions. Maintained with the same principle.

Map data © OpenStreetMap contributors. Routing via OpenRouteService. Elevation data via open providers.

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Additional Information