# StraboTools

> Geologic field analysis app for quantitative rock fabric and mineral composition. (iPhone/iPad app by The University of Kansas.)

- Source: https://appshunter.io/ios/app/strabotools/id1496239162 (this page in markdown: same URL + `.md`)
- Developer: [The University of Kansas](https://appshunter.io/developer/726307325)
- Category: Education
- Price: Free
- Rating: 5.00/5 from 10 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 14 MB
- Languages: English
- Released: 2020-02-25
- Data updated: 2026-06-04
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/strabotools/id1496239162/reviews.md

## What is StraboTools?

StraboTools is designed to aid geologic field work by providing quantitative data that are otherwise difficult to estimate in the field. The app was developed for work in plutonic rocks such as granite, but it can be useful in field work in any type of rock and for study of thin sections as well. The app analyzes a photograph taken within the app or imported into it.

•The Edge Fabric tool plots an ellipse that summarizes the orientations of image brightness gradients. In rocks with a fabric produced by deformation, this ellipse provides the orientation of the fabric and an axial ratio, which correlates with bulk deformation. The tool also reports the orientation in space of the line defined by the long axis of the ellipse. If, for example, the fabric being measured is planar, then these intersection lineations will lie on a great circle. Edge fabric diagrams are useful both in the field and for analysis of photomicrographs.

•The Color Index tool allows quantitative determination of the color index (CI; area percent dark minerals) from a photograph. The user takes a photograph and then moves a slider to highlight those pixels darker than a certain threshold. The resulting area percent is displayed. Both adaptive and full-image thresholding are available.

•Edge Detect applies an edge detection filter to the image. This can be useful in highlighting subtle features in an outcrop and in interpreting edge fabric ellipses.

## Key features

- Edge Fabric tool for orientation analysis
- Color Index tool for mineral composition
- Edge detection filter
- Analyzes photos in-app or imported
- Useful for plutonic and other rock types
- Supports thin section study

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/strabotools/id1496239162/reviews.md

### 5/5 — Metallurgical Analysis Made Easy

*2025-03-14*

I found this tool very useful for analyzing metallurgical cross sections.  My company makes metal matrix composite materials. This is a great tool to analyze SEM polished cross section microstructures.

It would be great if you could put a scale feature on this so that you could calculate average particle size.  But that’s asking too much.

## Frequently asked questions about StraboTools

### What is StraboTools used for?

StraboTools is designed to aid geologic field work by providing quantitative data that are difficult to estimate in the field. It analyzes photographs to help determine rock fabric orientations and mineral composition.

### What kind of rocks can StraboTools analyze?

While developed for plutonic rocks like granite, StraboTools can be useful for field work in any type of rock and for the study of thin sections.

### How does the Edge Fabric tool work?

The Edge Fabric tool plots an ellipse summarizing the orientations of image brightness gradients. This ellipse provides the orientation of the fabric and an axial ratio, correlating with bulk deformation.

### How does StraboTools determine the Color Index?

The Color Index tool allows quantitative determination of the color index from a photograph. Users highlight pixels darker than a certain threshold, and the app displays the resulting area percent.

### Is StraboTools available on Android?

Based on the provided data, StraboTools is available on iPhone, iPad, and iPod. Information regarding Android compatibility is not available.

### How often is StraboTools updated?

The latest version of StraboTools, 1.5, was last updated on August 30, 2023. This indicates a relatively recent update frequency.

### What is the age rating for StraboTools?

StraboTools has an age rating of 4+. This suggests it is suitable for a wide range of users, including younger learners.

### Does StraboTools have ads?

No, StraboTools does not contain advertisements. The app is free to download and use without any ad interruptions.

## Version history (last 4 releases)

### 1.5 — 2023-08-30

Added Modal Tool.
Added Spot Name and Notes Fields for better alignment with StraboSpot field app.
Updated StereoNet export for new data format.

### 1.2 — 2020-05-03

Improved Edge Fabric Functionality
Redesigned UI Layout for Smaller Devices
Edge Detect Enhanced for More Clarity

### 1.1 — 2020-03-03

This version has several bug fixes, including the fix of crashes due to Location Services being unavailable.

### 1.0 — 2020-02-25

No release notes.

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All apps by The University of Kansas: https://appshunter.io/developer/726307325

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-04.*