# Radiology Core vs ACR Guidance

The clearest difference is price: ACR Guidance at Free against Radiology Core's $9.99. ACR Guidance also leads on update cadence (every 2 months vs every 6 months). Radiology Core's advantage is chart position (#56 vs unranked) and ratings volume (50 vs 12). On rating, review sentiment, ads and in-app purchases there is nothing between them.

ACR Guidance is free to download; Radiology Core costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ACR Guidance holds the better App Store score, 3.1 against 2.9. Both are backed by a comparable volume of ratings — 50 and 12 respectively. Written reviews point the same way: 24% of Radiology Core's written reviews are positive against 25% of ACR Guidance's.

Radiology Core ships an update every 6 months, ACR Guidance every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Radiology Core | ACR Guidance |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [2.9 (50 ratings)](https://appshunter.io/ios/app/radiology-core-physics-plus/id1225040758/reviews) | **[3.1 (12 ratings)](https://appshunter.io/ios/app/acr-guidance/id1484701466/reviews)** |
| Number of ratings | **50** | 12 |
| Positive reviews | 23.8% of reviews | **25.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Best chart rank | **#56** | — |
| Size | 25 MB | 111 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Lieu Duong](https://appshunter.io/developer/1657425589) | [The American College of Radiology](https://appshunter.io/developer/493774954) |

## What reviewers say

### Radiology Core

[App page](https://appshunter.io/ios/app/radiology-core-physics-plus/id1225040758)

**Currently charting:** #56 Top Paid · Medical (US App Store)

Prepare for the Radiology Core Exam's physics section with a premium resource. Access over 500 board-relevant questions with detailed explanations, covering all modalities and noninterpretive skills. The app is continually updated with new content to enhance your study time.

**Highlights:** Comprehensive physics review, Over 500 board-relevant questions, Full explanation for each question, Covers all modalities, Includes noninterpretive skills, Continually updated content

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

**In-app purchases:** none


### ACR Guidance

[App page](https://appshunter.io/ios/app/acr-guidance/id1484701466)

Access clinical guidance content from the ACR on your mobile device. Includes resources for contrast reactions, reporting systems, and incidental findings. Designed for healthcare professionals needing on-the-go reference materials.

**Highlights:** Interactive clinical guidance, ACR Contrast Reaction Cards, Reporting and Data Systems (RADS) content, Incidental Findings (IF) content, On-the-go reference materials

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Radiology Core free?

Radiology Core costs $9.99, with no in-app purchases.

### Is ACR Guidance free?

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

### Which has better reviews, Radiology Core or ACR Guidance?

ACR Guidance is rated higher. Radiology Core averages 2.9 out of 5 from 50 ratings, while ACR Guidance averages 3.1 from 12 ratings.

### Do Radiology Core or ACR Guidance have ads?

Neither Radiology Core nor ACR Guidance shows ads.

### Which is updated more often, Radiology Core or ACR Guidance?

Radiology Core ships an update every 6 months, and ACR Guidance every 2 months. Most recently, Radiology Core was updated on November 2, 2026 and ACR Guidance on November 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.*