TopoWalk: Survey & Altimeter

GHF Software

In-app purchases

About this app

TopoWalk is the field surveying app that turns your phone's GPS and barometer into an accurate measuring tool — at no cost.

Walk the perimeter, capture points, and get area, perimeter, slope and a print-ready report, all in your pocket.

✅ **Barometric Precision** — the phone's pressure sensor gives you accurate elevation changes, not just GPS.

✅ **Real 3D Visualization** — see your surveyed polygon in an isometric 3D view, right in the app.

✅ **Built for Professionals** — export to QGIS and ArcGIS via GeoJSON.

✅ **PDF Reports** — a full A4 report, ready to print or send to a client.

✅ **Made a mistake? Fix it.** — reopen a saved survey and remove or insert a point at any position, without re-measuring the whole perimeter.

✅ **Backup to your Drive** — your whole history fits in one file, stored wherever you want. Your work doesn't disappear if your phone breaks.

✅ **Slope in %** — not just the angle: the number people working in grading and drainage actually use.

✅ **Annotate without messing up the survey** — the reference tree, the gate, the erosion: points of interest are saved with the survey and **stay out** of the area and perimeter.

✅ **Import your own KML** — load the file from your land registry or from your client (KML, KMZ, GeoJSON, GPX or CSV) and see the outline on the map, next to what you measured. Importing is free.

✅ **The essentials are free, always** — capturing points, area and slope, the 3D view, the PDF report, GeoJSON/KML/GPX export and backup: all free, with no ads and no usage limits.

➕ **TopoWalk Pro (optional, one-time purchase)** — for those who deliver reports to clients: PDF with your own logo and professional registration, DXF export for AutoCAD, CSV export for spreadsheets, **net area** (subtract a pond, a shed or a protected strip and get the truly usable area), **field photos in the report**, **high-stability capture** (average of 10 readings), and stake-out (walking back to a surveyed point). One payment, no subscription.

Ideal for farmers, engineers, surveyors, hikers, and anyone who needs to measure area, distance or elevation in the field.

What’s new

TopoWalk Pro has arrived, as an optional one-time purchase — everything you already use stays free, with no ads and no usage limit.

New in Pro: export to DXF for AutoCAD, export to CSV for spreadsheets, PDF reports with your own logo and license number, and stake-out (walk back to a surveyed point). If you already had TopoWalk installed, Pro is unlocked for you at no cost.

Also: more reliable external GPS/RTK reconnection.