Best Free Geology Apps in 2025 — Field Tools Compared

1. GeoKit — Best All-in-One Geology App

GeoKit stands out as the most complete free geology app available. It combines a digital strike & dip compass, barometric altimeter, real-time earthquake monitoring, 5 geological marker types, distance/area measurement, multi-layer maps, and GIS export — all in a single app.

What sets GeoKit apart is its offline-first architecture. Every feature works without an internet connection — critical for remote fieldwork. Data syncs to the cloud automatically when you reconnect, so nothing is ever lost.

Strengths

• All-in-one: compass, altimeter, earthquakes, markers, maps, export
• 5 specialized marker types (Fault, Sample, Mineral, Outcrop, POI)
• Truly free — no ads, no subscriptions, no feature locks
• Offline-first with automatic cloud sync
• KML and GeoJSON export for QGIS/ArcGIS/Google Earth

Considerations

• Newer app — community is still growing
• No stereonet plotting (yet)

2. Fieldmove Clino

Developed by Petrolia (now part of Halliburton), Fieldmove Clino is a well-known geological compass app. It offers strike & dip measurement with a clear interface and stereonet visualization.

Strengths

• Established tool, well-known in academia
• Built-in stereonet visualization
• Simple, focused compass interface

Considerations

• Pro features behind paywall
• Limited to compass — no mapping, altimeter, or earthquake feed
• No KML/GeoJSON export in free version

3. RockLogger

RockLogger is a focused geological data collection app for Android. It provides compass measurements, GPS waypoints, photo logging, and basic data export.

Strengths

• Free with no ads
• Good compass and data logging
• KML export support

Considerations

• Android only — no iOS version
• No altimeter or earthquake monitoring
• Dated interface

4. Geologist's Tools

Geologist's Tools is a utility-focused app that provides a geological compass, unit converter, hardness scale reference, and some basic geological calculators.

Strengths

• Useful reference tools (hardness scale, unit converter)
• Simple compass interface

Considerations

• Android only
• Pro version required for some features
• No mapping, no markers, no GeoJSON export

Feature Comparison Table

Our Verdict

If you want a single free app that covers every aspect of geological fieldwork — from structural measurements to earthquake awareness to GIS export — GeoKit is the clear winner. It's the only app that combines compass, altimeter, earthquake monitoring, 5 marker types, and dual-format export in one free package on both platforms.

Fieldmove Clino remains a solid choice if you specifically need stereonet visualization and are willing to pay for pro features. RockLogger is a decent free alternative for Android users who need basic data logging.

For most geology students and field professionals, GeoKit offers the best value — professional tools at zero cost, working fully offline, with export formats that plug directly into your GIS workflow.