LetsGeo vs geodb field

Let’sGeo - Professional Geological Field Logging App Let’sGeo is an offline-first app for geological and geotechnical logging, drilling and mineral exploration. Designed for fieldwork and core sheds, it combines geological observations, structural measurements, drilling data and mapping. Works fully offline, with optional upload to your own servers. Key Features Geological & structural logging - Field points: lithology, mineralization, alteration and weathering - Geological codes and free-text descriptions - Compass and clinometer for dip and dip direction - Bedding, joints, faults, shear zones and veins - Vein thickness, mineralogy and density - Schmidt & Wulff stereonets Drilling & sampling - Drillhole runs and recovery tracking - Interval sampling with metadata - Geological samples linked to logging intervals Geotechnical logging - Single structural records linked to depth - Interval-based geotechnical domains - Core recovery, SCR and RQD - Rock mass parameters and fracture angle classes - Core boxes with depth-linked photos Mapping & GIS - GPS points and drillholes - WGS-84, UTM and Gauss-Krüger coordinates - GPS tracks and accuracy recording - Custom markers, colors and visibility controls - Compass-oriented maps with live azimuth - Distance and true bearing to points and drillholes - KMZ layers with drawing and editing tools - KMZ layer ordering and management - Offline satellite imagery - Spectral maps for mineral exploration - SWIR lithology, clay alteration and iron oxide composites - Download spectral scenes for offline interpretation Reference Collection - Project-based geological reference collections - Rock photos, descriptions and geological notes - Import and export between projects and devices - Reference image similarity search - Compare field photos with reference samples - Find similar rocks using image analysis of color, grain characteristics, textures and veins Media & data - Photos, video and audio linked to observations - Geological field sketch sheets - Photo annotation and markup - Local offline data storage - Full project export and import - Project Database Archive export - Merge archives from multiple devices - Cross-platform exchange between Android and iOS Connect DB - Your Own Server - Direct project upload to your PostgreSQL database - Optional S3-compatible storage for media - Use your own company or project infrastructure - Multiple geologists can upload to one shared project - Incremental upload: add new and update changed records - Unchanged records are skipped - Existing server data is preserved - Manual, one-way upload without automatic downloads - No developer-operated cloud required Privacy & Data Control Let’sGeo works offline and stores project data locally. Connect DB optionally uploads data directly to your own PostgreSQL database and S3-compatible storage. No developer-operated cloud is required. Your data. Your infrastructure. Your control. Privacy Policy: https://letsgeo.world/privacy.php Terms of Use (EULA): https://letsgeo.world/terms.php

geoDB Field — offline data collection for mineral exploration Log drill holes, collect soil and rock samples, and map geology in the field — online or off. Built for geologists and field crews who need their data captured accurately the first time, without cell signal. Three workflows, one app Drill Logging — Record collars, lithology, alteration, structure, mineralization, and samples against a downloaded drill hole, with GPS surveys and 4K core photos. Everything queues locally and syncs when you're back in range. Field Work — Execute planned soil sampling and claim staking programs with GPS navigation. Quality-control bags (standards, blanks, duplicates) download to your device and fill by scanning a barcode — no more writing bag numbers by hand. Stations that still owe a field duplicate are marked right on the map. If a project runs more than one sampling program, pick which one you're working and the station list, map, and QC queue all narrow to match. Geologic Mapping — GPS-tied sketches, structure measurements, field notes, and photo capture, with your drill holes, samples, and claims rendered as reference layers underneath. Built for the field, not the office Full offline support — every workflow works with zero signal, syncs automatically once you're connected. Dark mode throughout, for early starts and late nights in camp. A live compass overlay for structural measurements (strike/dip). Configurable coordinate formats and high-accuracy GPS. View your other projects on the map as read-only reference context. Free to use — no subscription required. Create an account to protect your data and sync across devices; local-only projects work without one. Part of the geoDB platform — the same data your field crews collect syncs straight to your team's geoDB web account for QA/QC, reporting, and 3D visualization.