# Gamma Calculator Pro vs GOARC

The clearest difference is review sentiment: GOARC at 100% against Gamma Calculator Pro's 53%. GOARC also leads on price (Free vs $3.99) and update cadence (every 6 weeks vs every 5 months). Gamma Calculator Pro's advantage is chart position (#16 vs unranked). On ads, in-app purchases and device support there is nothing between them.

GOARC is free to download; Gamma Calculator Pro costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Gamma Calculator Pro ships an update every 5 months, GOARC every 6 weeks. The most recent releases landed on November 11, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Gamma Calculator Pro | GOARC |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[3.6 (19 ratings)](https://appshunter.io/ios/app/gamma-calculator-pro/id867478383/reviews)** | — |
| Number of ratings | **19** | — |
| Positive reviews | 52.9% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 6 weeks** |
| Monetization | Paid | **Free** |
| Best chart rank | **#16** | — |
| Size | 3 MB | 26 MB |
| Requires iOS | 18.6 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Gerrit kleyn Winkel](https://appshunter.io/developer/797512757) | [Go-Arc LTD.](https://appshunter.io/developer/466254618) |

## What reviewers say

### Gamma Calculator Pro

[App page](https://appshunter.io/ios/app/gamma-calculator-pro/id867478383)

**Currently charting:** #16 Top Paid · Business (US App Store)

This app simplifies radiation exposure calculations for industrial radiography sources like Iridium-192. It allows users to input thickness, activity, and distance to determine correct exposure times, and also offers features for geometric unsharpness, exposure correction, and decay calculations.

**Highlights:** Exposure Time Calculator, Geometric Unsharpness Calculator, Exposure Correction Calculator, Decay Calculator, Barricade Calculator, Pipe Schedule Selector, Material Density Calculations

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### GOARC

[App page](https://appshunter.io/ios/app/goarc/id1195569309)

This enterprise solution connects best practices and organizational knowledge to enhance safety performance. It uses predictive analytics to prevent work accidents, saving lives and money while empowering compliance.

**Highlights:** Predictive analytics for accident prevention, Improves safety performance, Empowers compliance, Connects best practices and organizational know-how, Reduces risks for accidents

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Gamma Calculator Pro free?

Gamma Calculator Pro costs $3.99, with no in-app purchases.

### Is GOARC free?

GOARC is free to download, with no in-app purchases.

### Do Gamma Calculator Pro or GOARC have ads?

Neither Gamma Calculator Pro nor GOARC shows ads.

### Which is updated more often, Gamma Calculator Pro or GOARC?

Gamma Calculator Pro ships an update every 5 months, and GOARC every 6 weeks. Most recently, Gamma Calculator Pro was updated on November 11, 2026 and GOARC on November 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*