# Lithotheque > Transform your smartphone into a geological field assistant. Canonical page: [https://chrome-stats.com/d/com.lithotheque.app.release](https://chrome-stats.com/d/com.lithotheque.app.release) ## Overview - **ID:** `com.lithotheque.app.release` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** GeoStratum - **Category:** TOOLS - **Downloads:** 1,031 - **Version:** 3.2.0 - **Last updated:** 2026-07-22 - **First published:** 2026-02-05 - **Publisher country:** FR - **Size:** 139 MB - **Data as of:** 2026-09-10 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.lithotheque.app.release) - **Website:** [https://www.geostratum.eu](https://www.geostratum.eu/) - **Privacy policy:** [https://www.geostratum.eu/lithotheque/legal/](https://www.geostratum.eu/lithotheque/legal/) ## Description Transform your smartphone into a geological field assistant.

www.geostratum.eu

Lithotheque is the professional app designed for geologists, Earth science students, paleontologists, and mineralogy enthusiasts. Replace your paper notebook, compass, and maps with a complete, secure, and fully offline digital solution.

MAIN FEATURES:

🌍 Mapping & Geolocation

Specialized Base Maps: Access global geological maps (Macrostrat) and French maps (BRGM / InfoTerre).

Offline Mode: Download and cache map tiles to work in dead zones without any internet connection.

Geolocation: Automatic recording of GPS coordinates (Latitude, Longitude, Altitude) and address conversion.


⚒️ Structural Measurement Tools

Integrated Compass & Clinometer: Instantly measure Dip and Strike/Azimuth of planes and lineations by placing your device on the outcrop.

Stereonet: Visualize your structural measurements directly on a Schmidt or Wulff net and calculate mean vectors.

Augmented Reality (AR): Locate your sampling points and visualize distances and orientations in real-time via the camera.


📝 Digital Field Notebook

Detailed Sheets: Input lithology, stratigraphy (integrated ICS chronostratigraphic chart), texture, minerals, fossils, and chemical tests (HCl).

Photos & Sketches: Take photos and annotate them with sketches directly in the app.

Field Checklist: Never leave without your gear (hammer, hand lens, PPE) thanks to the integrated checklist.


🤖 Advanced Artificial Intelligence

Local AI (100% Private & Offline): Use visual recognition and voice dictation to fill your notes without sending data to the internet.

Scale Detection: The AI automatically verifies if a scale (coin, hammer, pen) is present in your sample photos.

Cloud Assistant (Optional): Connect your Gemini API key to enrich descriptions, obtain paleogeographic contexts, or tell the geological history of your samples.


📂 Exports & Reports

Standard Formats: Export your data to your favorite GIS software (QGIS, ArcGIS, Google Earth) in CSV, GeoJSON, GPX, and KML.

PDF Reports: Automatically generate printable PDF sheets of your observations.

ZIP Backup: Archive all your data and images in a portable ZIP file.


🔒 Privacy & Security

Local-First: Your data belongs to you. Everything is stored locally on your device. No account creation is required.

Encryption: Your personal API keys are encrypted with AES-256.

Whether you are doing mapping, sedimentology, metamorphism studies, or simple sampling, Lithotheque is the tool that accompanies you everywhere, from the laboratory to the most remote terrains. ## Rankings - #1,146,289 — Overall ## Permissions and access ### Permissions - `android.permission.ACCESS_COARSE_LOCATION` - `android.permission.ACCESS_FINE_LOCATION` - `android.permission.ACCESS_NETWORK_STATE` - `android.permission.CAMERA` - `android.permission.FOREGROUND_SERVICE` - `android.permission.FOREGROUND_SERVICE_DATA_SYNC` - `android.permission.HIGH_SAMPLING_RATE_SENSORS` - `android.permission.INTERNET` - `android.permission.POST_NOTIFICATIONS` - `android.permission.READ_MEDIA_IMAGES` - `android.permission.READ_MEDIA_VISUAL_USER_SELECTED` - `android.permission.RECEIVE_BOOT_COMPLETED` - `android.permission.RECORD_AUDIO` - `android.permission.VIBRATE` - `android.permission.WAKE_LOCK` - `com.android.vending.BILLING` - `com.android.vending.CHECK_LICENSE` - `com.lithotheque.app.release.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` ## Similar extensions and apps - [Geo ID](https://chrome-stats.com/d/com.geoid.app) — 306 users - [Lithica Explorer](https://chrome-stats.com/d/com.gisgeodev.lithicaexplorer) — 445 users - [lithogrid](https://chrome-stats.com/d/com.lithogrid.app) — 3 users - [GeoStratyx](https://chrome-stats.com/d/com.geostratyx.app) — 2 users - [eGEO Compass GS by GeoStru](https://chrome-stats.com/d/eu.geostru.android.egeocompassgs) — 66,902 users, 1.00 / 5 - [eGEO Compass ProDEMO IntGeoMod](https://chrome-stats.com/d/eu.marcofoi.android.egeocompasspro) — 10,257 users, 1.00 / 5 - [Hutton App](https://chrome-stats.com/d/com.hutton.geology) — 43 users - [GeoTools Field](https://chrome-stats.com/d/com.geotools.fieldapp.pro) — 130 users - [Outcrop360](https://chrome-stats.com/d/com.outcropco.outcrop360) — 203 users - [StrucTool](https://chrome-stats.com/d/com.gindllc.structool) — 4 users - [Let'sGeo](https://chrome-stats.com/d/world.letsgeo.app) — 1,548 users - [Topographia Classic](https://chrome-stats.com/d/com.Topographia.Classic) — 6,450 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.lithotheque.app.release)