# Ug Calc

> Geometric unsharpness calculator for industrial radiography. (iPhone/iPad app by Lance Henderson.)

- Source: https://appshunter.io/ios/app/ug-calc/id436130906 (this page in markdown: same URL + `.md`)
- Developer: [Lance Henderson](https://appshunter.io/developer/348247919)
- Category: Utilities
- Price: Free
- Rating: 5.00/5 from 5 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.0 · 0 MB
- Languages: American English
- Released: 2011-05-12
- Data updated: 2026-06-03
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/ug-calc/id436130906/reviews.md

## What is Ug Calc?

A Geometric Unsharpness Calculator for Industrial Radiographers.

You just have to enter the Source Side of the Weld or Object being radiographed to the film and source distances and also enter the source size (diagonal).

It will then calculate the Geometric Unsharpness (Ug) for you!

No more have to look up the formula and pulling out a calculator.

## Key features

- Geometric Unsharpness (Ug) calculation
- Input source-to-film distance
- Input source-to-object distance
- Input source size (diagonal)
- Eliminates manual formula lookup

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/ug-calc/id436130906/reviews.md

### 5/5 — Sweet

*2014-04-01*

Sweet apps need to make one for same sec8

### 4/5 — Should have mm conversion for the lazy

*2012-05-31*

Some people use mm out side of the USA.

### 5/5 — Great apps!!

*2012-04-27*

You really have some great apps!!! This is just another one of your awesome helpful apps!!!! Keep it up!!!

### 5/5 — Radiographer

*2012-02-09*

Great tool saves time when your out in the field

### 5/5 — Asst. radiographer

*2011-10-18*

Works great.

## Frequently asked questions about Ug Calc

### What is Ug Calc used for?

Ug Calc is a specialized calculator designed for industrial radiographers to determine the Geometric Unsharpness (Ug) of an image. It simplifies the process by taking key measurements and providing the result directly.

### How do I use Ug Calc?

To use Ug Calc, you need to input the distance from the source to the film, the distance from the source to the object being radiographed, and the size of the source (diagonal). The app then calculates the Geometric Unsharpness (Ug).

### Does Ug Calc have ads?

No, Ug Calc does not contain advertisements. It is a free utility designed to provide a clean and focused experience for its users.

### What devices is Ug Calc available on?

Ug Calc is available for iPhone and iPod devices. It is designed to run on these Apple mobile platforms.

### How often is Ug Calc updated?

The latest version of Ug Calc is 1.1, which was last updated on October 25, 2017. While not frequently updated, it remains a stable tool for its intended purpose.

### What is the age rating for Ug Calc?

Ug Calc has an age rating of 4+. This indicates it is suitable for users of all ages, with no content restrictions.

### Is Ug Calc free to download?

Yes, Ug Calc is completely free to download and use. There are no costs associated with acquiring or utilizing its calculation features.

### What is the user sentiment for Ug Calc?

Ug Calc has received overwhelmingly positive feedback, holding a perfect 5.0-star rating from 5 reviews. This suggests users find it highly effective and valuable for their work.

## Version history (last 2 releases)

### 1.1 — 2017-10-25

This app has been updated by Apple to display the Apple Watch app icon.

Updated to work on iOS 11

### 1.0 — 2011-05-12

No release notes.

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## More apps by Lance Henderson

- [Barricade](https://appshunter.io/ios/app/barricade/id348247916)
- [X-Ray Timer](https://appshunter.io/ios/app/x-ray-timer/id350390647)
- [Density](https://appshunter.io/ios/app/density/id458423388)

All apps by Lance Henderson: https://appshunter.io/developer/348247919

## Related topics

[lance henderson](https://appshunter.io/ios/topics/lance-henderson)

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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 2026-06-03.*