# ContrastRx vs Radiology Core

The clearest difference is review sentiment: Radiology Core at 100% against ContrastRx's 50%. Radiology Core also leads on rating (5.0 vs 4.4) and iOS requirement (9.0 vs 16.6). ContrastRx's advantage is update cadence (every 3 weeks vs every 22 months) and ratings volume (9 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Radiology Core holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: ContrastRx has 9 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 50% of ContrastRx's written reviews are positive against 100% of Radiology Core's.

ContrastRx ships an update every 3 weeks, Radiology Core every 22 months. The most recent releases landed on October 13, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | ContrastRx | Radiology Core |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (9 ratings)](https://appshunter.io/ios/app/contrastrx/id619478666/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/radiology-core-physics/id1178469466/reviews)** |
| Number of ratings | **9** | 1 |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 22 months |
| Monetization | Free | Free |
| Size | 9 MB | 20 MB |
| Requires iOS | 16.6 | **9.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Mayo Clinic](https://appshunter.io/developer/350350016) | [Lieu Duong](https://appshunter.io/developer/1657425589) |

## What reviewers say

### ContrastRx

[App page](https://appshunter.io/ios/app/contrastrx/id619478666)

Provides quick access to treatment regimens for life-threatening reactions to radiographic contrast agents. Includes clinical descriptions, visual examples, and treatment protocols, along with helpful calculators and information on nephrogenic systemic fibrosis.

**Highlights:** Treatment regimens for contrast reactions, Clinical descriptions and pictorial examples, eGFR calculator, Pediatric dose calculator, Steroid pretreatment regimens, Nephrogenic systemic fibrosis overview

**Features:** Vision Pro support

**In-app purchases:** none


### Radiology Core

[App page](https://appshunter.io/ios/app/radiology-core-physics/id1178469466)

Prepare for your Radiology Core Exam with this free resource. It offers a growing question bank to help you study. Contact the developer with feedback for improvements.

**Highlights:** Radiology Core Exam preparation, Physics subject focus, Growing question bank, Free resource, Feedback integration

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

**In-app purchases:** none


## Frequently asked questions

### Is ContrastRx free?

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

### Is Radiology Core free?

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

### Which has better reviews, ContrastRx or Radiology Core?

Radiology Core is rated higher. ContrastRx averages 4.4 out of 5 from 9 ratings, while Radiology Core averages 5.0 from 1 ratings.

### Do ContrastRx or Radiology Core have ads?

Neither ContrastRx nor Radiology Core shows ads.

### Which is updated more often, ContrastRx or Radiology Core?

ContrastRx ships an update every 3 weeks, and Radiology Core every 22 months. Most recently, ContrastRx was updated on October 13, 2026 and Radiology Core on October 3, 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.*