# Gamma Calculator Pro vs Evident Link Plus

The clearest difference is price: Evident Link Plus at Free against Gamma Calculator Pro's $3.99. Evident Link Plus also leads on iOS requirement (12.0 vs 18.6). Gamma Calculator Pro's advantage is update cadence (every 5 months vs every 53 months) and chart position (#17 vs unranked). On ads, in-app purchases and device support there is nothing between them.

Evident Link Plus 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, Evident Link Plus every 53 months. The most recent releases landed on October 24, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Gamma Calculator Pro | Evident Link Plus |
| --- | --- | --- |
| 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 | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 53 months |
| Monetization | Paid | — |
| Best chart rank | **#17** | — |
| Size | 3 MB | 8 MB |
| Requires iOS | 18.6 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Gerrit kleyn Winkel](https://appshunter.io/developer/797512757) | [Evident Scientific, Inc.](https://appshunter.io/developer/1445691125) |

## What reviewers say

### Gamma Calculator Pro

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

**Currently charting:** #17 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


### Evident Link Plus

[App page](https://appshunter.io/ios/app/evident-link-plus/id1450519480)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Gamma Calculator Pro free?

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

### Is Evident Link Plus free?

Evident Link Plus is free to download, with no in-app purchases.

### Do Gamma Calculator Pro or Evident Link Plus have ads?

Neither Gamma Calculator Pro nor Evident Link Plus shows ads.

### Which is updated more often, Gamma Calculator Pro or Evident Link Plus?

Gamma Calculator Pro ships an update every 5 months, and Evident Link Plus every 53 months. Most recently, Gamma Calculator Pro was updated on October 24, 2026 and Evident Link Plus on October 1, 2026.

---

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