Let’sGeo — professional geological field logging app
Let’sGeo is a professional offline field tool for geological and geotechnical logging, drilling operations and mineral exploration.
Designed for real field and core shed work, it combines geological descriptions, structural measurements and drilling data in a single, structured workflow — fully offline.
Key features
Geological & structural logging
• Field points with lithology, mineralization, alteration and weathering
• Standardized geological codes with free-text descriptions
• Built-in compass and clinometer for dip and dip direction
• Structural elements: bedding, joints, faults, shear zones and veins
• Vein parameters: thickness, mineralogy and density
• Stereonet (Schmidt & Wulff) visualization
Geotechnical logging in drillholes
• Two-level workflow:
– Single structural records linked to depth
– Interval-based geotechnical domains
• Core recovery, TCR, SCR and RQD
• Rock mass parameters and fracture angle classes
• Core boxes with depth-linked photo documentation
Drilling & sampling
• Drillhole runs and recovery tracking
• Interval sampling with full metadata
Mapping & GIS
• GPS points and drillholes
• Coordinate input and conversion (WGS-84, UTM, Gauss–Krüger)
• GPS track recording
• KMZ layers with map drawing tools
• Satellite spectral maps for mineral exploration
• SWIR lithology, clay alteration and iron oxide composites
• Download spectral scenes for offline geological interpretation
Media & data
• Photos, video and audio linked to observations
• Offline-first: all data stored locally
• Full project export/import and merge between devices
Privacy
Let’sGeo stores all data locally on your device.
Nothing is uploaded or shared unless you explicitly choose to export it.
Privacy Policy: https://letsgeo.world/privacy.php
Terms of Use (EULA): https://letsgeo.world/terms.php
Ratings & Reviews
This app hasn’t received enough ratings or reviews to display an overview.
Improved GPS coordinate acquisition for points and drillholes.
• Added GPS accuracy display when capturing coordinates
• Coordinates can now be refreshed multiple times to achieve better accuracy
• Improved handling of weak or unavailable GPS signals
• Added clearer status messages when the device cannot provide coordinates
• More reliable field coordinate capture workflow
Version 1.7.5
The developer, Letsmine SIA, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
Letsmine SIA
Size
21.3 MB
Category
Productivity
Compatibility
Requires iOS 18.6 or later.
iPhone Requires iOS 18.6 or later.
Mac Requires macOS 15.6 or later and a Mac with Apple M1 chip or later.
Apple Vision Requires visionOS 2.6 or later.
Location
This app may use your location even when it isn’t open, which can decrease device battery life.