# UNC Test

> Automates unconfined compression tests with GCTS Wireless Point Load Testing System. (iPhone/iPad app by Geotechnical Consulting and Testing Systems.)

- Source: https://appshunter.io/ios/app/unc-test/id1493583732 (this page in markdown: same URL + `.md`)
- Developer: [Geotechnical Consulting and Testing Systems](https://appshunter.io/developer/539767606)
- Category: Productivity
- Price: Free
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 11.0 · 58 MB
- Released: 2020-01-14
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/unc-test/id1493583732/reviews.md

## What is UNC Test?

The Unconfined Compression Test Application was designed to be used in conjunction with a GCTS Wireless Point Load Testing System equipped with Unconfined Compression Test Platens. This application allows the user to easily perform and record data for an unconfined compression test by connecting wirelessly with the GCTS Point Load Testing System through Bluetooth.
All steps of test preparation can be easily read and transmitted to the application for ease-of-use. The operator can place a calibrated specimen in the Point Load Testing System for calibration of the crosshead position. The application uses a two-point calibration for the crosshead position.
By simply placing the specimen in the apparatus and applying a small load, the height of the specimen can be automatically measured. The user can continue to apply a load to the specimen, as the application will automatically begin the test once the height has been measured at the threshold load. 
The application automatically records the load and the height of the specimen during the test and creates a graph of the data in real-time. The unconfined compressive strength of the specimen will be automatically calculated and displayed at the end of the test. The application calculates and records the stress and strain on the specimen during testing, and a graph of this data can also be viewed in real-time. It also automatically calculates the Tangent Modulus at 50% strength. A real time display of the loading rate helps the user apply loads at the appropriate rate.
After performing the test, the data can be emailed direction from the application as a CSV spreadsheet. Test results are also saved in the application for later viewing.
This application also makes automatic corrections to the data to account for the frame deformation compliance. This correction gives the frame a “Virtual Infinite Stiffness” and all results are presented with this correction already performed. This means that the results given are extremely accurate.
This application must connect once to a GCTS Wireless Point Load Testing System before it can be used. Once it has connected to a system, the application may be opened and data may be viewed from any location.

## Key features

- Wireless Bluetooth connection to GCTS system
- Automatic specimen height measurement
- Real-time load and height data recording
- Automatic calculation of compressive strength
- Real-time stress and strain graphs
- Data export via CSV email
- Accurate frame deformation correction


## Frequently asked questions about UNC Test

### Does UNC Test have ads?

No, UNC Test does not contain advertisements. The application is free to use and does not display any ads.

### What devices is UNC Test compatible with?

UNC Test is available for iPhone, iPad, and iPod devices. It requires a connection to a GCTS Wireless Point Load Testing System.

### How accurate are the results from UNC Test?

The application provides extremely accurate results by automatically making corrections for frame deformation compliance, giving the frame a 'Virtual Infinite Stiffness'.

### Can I view test data after the test is complete?

Yes, test results are automatically saved within the application for later viewing. You can also email the data as a CSV spreadsheet.

### What is the update frequency for UNC Test?

The application was last updated on October 24, 2023, with version 1.2. Updates are released periodically to improve functionality and address any issues.

### How does UNC Test calculate compressive strength?

UNC Test automatically records the load and height of the specimen during the test, calculates the stress and strain, and then displays the unconfined compressive strength at the end of the test.

### What is the age rating for UNC Test?

UNC Test has an age rating of 4+, making it suitable for users of all ages. The app's functionality is designed for professional use.

### What is the Tangent Modulus calculation in UNC Test?

UNC Test automatically calculates the Tangent Modulus at 50% strength, providing an additional metric for material analysis during unconfined compression tests.

## Version history (last 3 releases)

### 1.2 — 2023-10-24

- Updated privacy text
- Reduce clipping of UI on some phones
- Better, more reliable connection
- Added stiffness correction for PLT frame
- Fixed issues with specimen image for project
- Better permissions handling

### 1.1 — 2020-06-23

- Fixed layout for iPhones with on-screen button
- Added importing of older projects via opening .csv files
   * To make use of this function, open a UNC-generated .csv file from you e-mail or Files app,press "Share" and select "Copy To UNC Test". If it doesn't work, open the UNC Test app before trying to copy to it.

### 1.0 — 2020-01-14

No release notes.

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All apps by Geotechnical Consulting and Testing Systems: https://appshunter.io/developer/539767606

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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 2026-06-10.*