---
title: "Gamma Calculator Pro — App Overview"
url: https://marlvel.ai/apps/klwinkel-com-gammacalc
category: Business
developer: Gerrit kleyn Winkel
platforms: ios, android
rating: 3.4 (302 ratings)
pricing: free
report_level: overview
generated: 2026-04-19
last_verified: "2026-04-19T01:04:59.321Z"
---

<!-- SECTION: Key Insight -->
> **Key Insight:** While the app offers comprehensive NDT calculation features, recent user feedback indicates critical stability issues following iOS updates and requests for more precise data inputs.

<!-- SECTION: Quick Facts -->
| Metric | Value |
|--------|-------|
| Category | Business |
| Rating | 3.4 ★ (302) |
| Pricing | free |
| Platforms | iOS, Android |
| Latest Version (iOS) | 2.7.1 |
| Latest Version (Android) | 1.4.2 |
| Developer | Gerrit kleyn Winkel |

<!-- SECTION: Summary -->
## What is Gamma Calculator Pro?

Gamma Calculator Pro is a specialized industrial tool designed for radiographers to calculate exposure times for Iridium-192, Selenium-75, and Cobalt-60 sources. It replaces traditional manual calculations and plastic slide rules by automating complex variables like material density, source-film distance, and decay. The app supports a wide range of materials and provides essential safety and geometric configuration tools for field operations.

<!-- SECTION: Key Features -->
## Key Features

- **Exposure and Decay Calculators**: Automates exposure time calculations based on source activity, material thickness, and distance, while accounting for radioactive decay.
- **Geometric and Correction Tools**: Includes specific modules for calculating geometric unsharpness and exposure corrections.
- **Material and Schedule Support**: Provides presets for various industrial materials and pipe schedules for both single and double-wall configurations.
- **Safety and Configuration Settings**: Features a barricade calculator and adjustable settings for Iridium-192 emissivity, weld enforcement, and unit preferences.

<!-- SECTION: Target Audience -->
## Who is it for?

Industrial radiographers and non-destructive testing (NDT) professionals.

<!-- SECTION: Links -->
## Links

- [App Store](https://apps.apple.com/us/app/gamma-calculator-pro/id867478383?uo=2)
- [Google Play](https://play.google.com/store/apps/details?id=gammaray.devraj.gammaraycalc&hl=en&gl=us)
- [Full Intelligence Report](https://marlvel.ai/apps/klwinkel-com-gammacalc)

---
*This is an overview report. Sentiment analysis, competitive landscape, and SWOT analysis are available in the [full intelligence report](https://marlvel.ai/apps/klwinkel-com-gammacalc).*
*Generated by [Marlvel.ai](https://marlvel.ai) — Independent app intelligence.*