The Best Mobile Apps for Geologists in 2026

Introduction

A geologist’s most important field tools haven’t changed: careful observation, sound judgement and the ability to interpret what the ground is telling you.

What has changed is how easily those observations can now be measured, recorded and shared.

With the right mobile apps, your phone or tablet can help you identify local geology, capture structural measurements, create field maps, complete surveys, navigate offline and attach accurate location data to photographs.

Some of these apps are built specifically for geologists. Others are professional mapping and data-collection platforms that can be configured around a geological workflow.

Here are some of the most useful mobile apps for geologists in 2026.

A note before heading into the field: 

Summary of Apps included in review

Identify rocks, minerals and local geology 

1. Rockd 

Available on: iOS and Android
Best for: Exploring local geology and recording observations

Rockd gives you instant access to geological information based on your location.

Developed by the Macrostrat team, the app allows you to explore geological maps, learn about the rock units beneath you and record your own field observations. It brings together geological maps and related information from a wide range of data providers around the world.

Rockd is useful for professional geoscientists, students and anyone who wants a quick way to understand the geology of a location. Its map coverage and level of detail will vary by region, so it should be treated as a starting point rather than a replacement for authoritative project data.

Visit the Rockd website

2. Geology Toolkit Lite

Available on: Android
Best for: Rock, mineral and fossil reference

Geology Toolkit Lite is a portable reference guide covering rocks, minerals and fossils.

It includes information designed to help users recognise hand specimens and understand important mineralogical and petrographic characteristics. The app can also work offline, which makes it useful in field locations where internet access is limited.

It is particularly suited to students, early-career geologists and experienced professionals who want a convenient reference guide on their phone.

View Geology Toolkit Lite on Google Play

Measure structures and capture field observations  

3. FieldMove Clino

Available on: iOS and Android
Best for: Structural measurements and geological field data

FieldMove Clino turns a compatible smartphone into a digital compass-clinometer.

It can be used to measure and record planar and linear geological features, including dip, dip direction, strike, trend and plunge. Measurements can be stored alongside location data, photographs and field notes.

The app also supports offline maps and can export data in formats including CSV and KMZ. This makes it a useful bridge between observations in the field and later interpretation in mapping or modelling software.

Because readings depend on the phone’s internal sensors, users should regularly calibrate their device and check important measurements against an appropriate field compass.

Learn more about FieldMove Clino

4. StraboField

Available on: iOS and Android
Best for: Comprehensive geological field data collection

StraboField is part of the StraboSpot digital data system, an open-source project developed specifically for geological fieldwork.

The app allows geologists to collect orientation measurements, notes, photographs, sketches and stratigraphic information. Observations can be recorded as points, lines or polygons and organised using flexible tags.

StraboField can work online or offline using built-in or custom basemaps. Data can then be uploaded to the StraboSpot system or exported locally.

It is one of the strongest options for geologists who want to replace a traditional field notebook with a more structured digital workflow.

Explore StraboField

5. FaultKin Mobile

Available on: iOS
Best for: Collecting and analysing fault-slip data

FaultKin Mobile is a specialised structural-geology app developed by geologist Rick Allmendinger.

It helps users collect, visualise and analyse fault-slip data in the field. The app can read the orientation of an iPhone or iPad and convert it into structural measurements, or users can enter measurements manually.

It can also perform calculations involving lines and planes, plot fault-plane solutions and display P and T axes.

FaultKin Mobile is more specialised than a general geological compass app, making it most useful for structural geologists and others undertaking fault and kinematic analysis.

View FaultKin Mobile on the App Store

6. Stereonet Mobile

Available on: iOS
Best for: Orientation data and stereographic analysis

Stereonet Mobile is another structural-geology app from Rick Allmendinger.

It is designed to collect, display and analyse geological orientation data using stereographic projections. It can be used as a companion to the desktop version of Stereonet or as a standalone mobile field tool.

For geologists who regularly work with bedding, joints, foliations, lineations and other structural measurements, it provides more specialised analysis than a standard compass-clinometer app.

View Stereonet Mobile on the App Store

7. Lambert

Available on: iOS
Best for: Basic geological compass measurements

Lambert turns an iPhone or iPad into a geological compass for measuring dip direction and dip angle.

Measurements can be displayed on a stereographic projection, supplemented with text notes and plotted on a map. Data can also be transferred from the device for further analysis.

It is a relatively simple, specialist option for iOS users. As with any phone-based compass, important measurements should be checked for accuracy and possible magnetic interference.

View Lambert on the App Store

 Create maps and collect professional field data 

8. QField

Available on: iOS and Android
Best for: Professional QGIS fieldwork

QField brings QGIS projects from the office into the field.

Users can prepare maps, layers, forms and symbology in QGIS before opening the project on a phone or tablet. Field teams can then view and edit spatial data, complete forms, attach photographs and work offline.

QField also supports connection to compatible external GNSS receivers when greater positional accuracy is required. Projects can be moved manually between devices or synchronised through QFieldCloud.

It is a powerful option for organisations already using QGIS or those looking for an open-source field GIS workflow.

Visit the QField website

9. Mergin Maps

Available on: iOS and Android
Best for: QGIS-based surveys and team data collection

Mergin Maps—previously known as Input—connects QGIS projects with mobile field teams.

Forms and project structures are prepared in QGIS and synchronised with the mobile app. Users can then collect field data, attach photographs, update mapped features and continue working without an internet connection.

Changes can be synchronised when connectivity returns, helping office and field teams work from a consistent dataset.

Mergin Maps is particularly useful for organisations that want a streamlined QGIS-based survey workflow with cloud synchronisation and collaboration.

Visit the Mergin Maps website

10. ArcGIS Field Maps

Available on: iOS and Android
Best for: Enterprise mapping and field operations

ArcGIS Field Maps is Esri’s primary mobile mapping application and the successor to the retired ArcGIS Collector app.

It combines map viewing, field data collection, smart forms, inspections and location sharing in one application. Teams can download maps for offline use, capture or update features and synchronise their work with ArcGIS Online or ArcGIS Enterprise.

The app can also work with supported high-accuracy GNSS receivers, making it suitable for professional field programs that require more precise location data.

ArcGIS Field Maps is a strong choice for businesses already operating within the Esri ecosystem.

Learn more about ArcGIS Field Maps

11. ArcGIS Survey123

Available on: iOS and Android
Best for: Form-based surveys and repeatable field inspections

ArcGIS Survey123 uses structured smart forms to collect field information.

Rather than beginning with a map, the workflow begins with a survey. Forms can include location data, photographs, required questions, calculations and conditional fields that change depending on the user’s responses.

Surveys can be completed offline and submitted to ArcGIS when a connection becomes available.

This makes Survey123 useful for repeatable geological, environmental, safety and operational inspections where data consistency is more important than detailed map editing.

Visit the ArcGIS Survey123 website

 Navigate and work offline 

12. Avenza Maps

Available on: iOS and Android
Best for: Offline navigation using georeferenced maps

Avenza Maps allows users to download or import georeferenced maps and use them without mobile reception.

The app can show your live GPS position on a map, record tracks, add placemarks, attach photographs and measure distances or areas. It supports formats including GeoPDF and GeoTIFF, making it useful when project or government maps are already available in a compatible format.

Avenza also operates a map store containing topographic, land-use and other specialist maps from a range of publishers.

For field teams that need straightforward offline access to a trusted map, it remains one of the most practical options available.

Visit the Avenza Maps website

13. GPX Viewer

Available on: Android
Best for: Viewing tracks, routes and waypoints

GPX Viewer allows users to open and analyse GPX, KML, KMZ and LOC files on an Android device.

It can display tracks, routes and waypoints over a map and provide information such as distance, speed and elevation. This makes it useful for reviewing planned access routes, navigating to field locations or checking tracks recorded by other devices.

It is a general navigation tool rather than a geology-specific application, but it can still fill a useful role in a geologist’s field toolkit.

View GPX Viewer on Google Play

14. GPS Test

Available on: Android
Best for: Checking GPS and satellite reception

GPS Test provides detailed information about the positioning data being received by an Android device.

It can display satellite signal information, location, altitude, compass heading and accurate local and UTC time. It supports a range of global navigation satellite systems, depending on the capabilities of the device.

The app is useful for checking whether a phone has achieved a reliable location fix before beginning a field survey. However, the information displayed does not guarantee survey-grade positional accuracy.

View GPS Test on Google Play

 Capture georeferenced photographs and analyse imagery 

15. Solocator

Available on: iOS and Android
Best for: Geotagged field photography

Solocator is a GPS field-camera app that can add location and directional information to photographs.

Depending on the device and selected settings, photographs can include coordinates, altitude, compass direction, date and time. Users can also add notes or project information to create a clearer record of what was photographed and where.

This can be useful when recording outcrops, drill sites, core facilities, access conditions or environmental observations.

As with any phone-based location tool, the accuracy of the information will depend on the device and conditions at the time the photograph is taken.

Visit the Solocator website

16. StraboTools

Available on: iOS
Best for: Geological fabric and image analysis

StraboTools uses photographs to quantify geological features that can otherwise be difficult to estimate consistently in the field.

Its tools can analyse preferred orientation within an image and estimate the proportion of components that can be distinguished by differences in brightness. This can help with the analysis of geological fabric and the estimation of mineral colour index.

The app was developed with plutonic rocks in mind but may also be useful for other rock types and for analysing thin-section images.

View StraboTools on the App Store

Conclusion: Choosing the right geological app 

The most useful app will depend on the job you need it to perform.

If you want to quickly understand the geology around you, start with Rockd. For structural measurements, consider FieldMove Clino, StraboField, FaultKin Mobile or Stereonet Mobile.

For more complete field mapping and data collection, QField, Mergin Maps and ArcGIS Field Maps provide powerful connections between work completed in the field and systems used in the office.

Avenza Maps is a strong option for straightforward offline mapping, while Survey123 is well suited to repeatable form-based surveys and inspections.

Before adopting any app across a team, test it under actual field conditions. Confirm that it works offline, produces the required export formats and is compatible with your organisation’s GIS, database and information-security requirements.

You should also establish consistent procedures for:

• Device and compass calibration
• Coordinate systems and map datums
• File naming and data structure
• Offline map preparation
• Data backup and synchronisation
• Measurement verification
• Device charging and protection
• Working safely without relying on mobile reception

The right app won’t replace geological knowledge or field experience. What it can do is make observations easier to capture, data easier to organise and information faster to share.

Have you used any of these apps in the field? Are there other geological apps you would recommend?

Let us know. We’ll continue updating this article as new tools become available.