Strike & Dip Compass App
Measure structural orientations directly from your phone. GeoKit's digital geological compass replaces traditional Brunton compasses and clinometers with a precise, easy-to-use interface designed for field geology.
Download FreeHow the Geological Compass Works
One-Step Measurement
Lay your phone flat on the bedding plane — in any orientation. Strike, dip, and dip direction are all captured together from a single placement, then auto-locked when the reading stabilizes.
Tilt-Compensated Sensors
Accelerometer and magnetometer readings are fused to reconstruct the plane's true attitude, with automatic magnetic declination correction — azimuths are reported against true north.
Save to Marker
Attach strike & dip data directly to geological markers on the map. Measurements are linked with GPS coordinates, photos, and field notes.
Why Use a Digital Geological Compass?
Traditional Brunton compasses are reliable, but they're also expensive, fragile, and require a careful two-step technique — first aligning for strike, then rotating to read dip. A digital strike and dip compass app like GeoKit collapses that into a single step, eliminates parallax errors, records measurements instantly, and ties every reading to a GPS location.
For geology students learning structural geology, the digital compass provides real-time feedback and reduces the learning curve. For professional field geologists, it speeds up data collection and eliminates manual transcription errors.
Every measurement is stored locally and can be exported as KML or GeoJSON — ready for QGIS, ArcGIS, or Google Earth without any additional conversion.
No parallax error — digital readings are consistent
Auto-linked to GPS coordinates and map markers
Export directly to KML/GeoJSON for GIS software
Works offline — no internet required in the field
100% free — no subscription or in-app purchases
Who Uses the Strike & Dip Compass?
Geology Students
Learn structural geology with real-time strike & dip measurements. No expensive equipment needed for field labs.
Field Geologists
Speed up structural mapping with automatic data recording. Focus on geology, not paperwork.
Researchers
Export measurement data to GIS for analysis. Every reading includes coordinates, timestamp, and geological context.
Frequently Asked Questions
Can a phone measure strike and dip accurately?
Yes. GeoKit fuses the phone's accelerometer and magnetometer with tilt compensation to reconstruct a plane's full attitude, and corrects to true north automatically. It is well suited to rapid reconnaissance and teaching; for the highest-precision structural work, many geologists still verify critical readings with a Brunton compass.
Does GeoKit correct for magnetic declination?
Yes. GeoKit applies magnetic declination automatically from your GPS position using the World Magnetic Model, so azimuths are reported against true north — even offline.
Do I still need a Brunton compass?
For fast data collection, and for students without a Brunton, no. For the highest precision many geologists carry both — the digital app for speed, the Brunton for verification.
Is the strike and dip compass free?
Yes. GeoKit is 100% free, with no ads, subscriptions, or in-app purchases.
Start Measuring Strike & Dip Today
Download GeoKit free and bring a digital geological compass to every outcrop.
