# ACR Guidance vs SIR Guidelines

The clearest difference is rating: SIR Guidelines at 5.0 against ACR Guidance's 3.1. SIR Guidelines also leads on update cadence (every 3 weeks vs every 2 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

SIR Guidelines holds the better App Store score, 5.0 against 3.1. Both are backed by a comparable volume of ratings — 12 and 23 respectively.

ACR Guidance ships an update every 2 months, SIR Guidelines every 3 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | ACR Guidance | SIR Guidelines |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.1 (12 ratings)](https://appshunter.io/ios/app/acr-guidance/id1484701466/reviews) | **[5.0 (23 ratings)](https://appshunter.io/ios/app/sir-guidelines/id1552455529/reviews)** |
| Number of ratings | 12 | **23** |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 111 MB | 28 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [The American College of Radiology](https://appshunter.io/developer/493774954) | [Society of Interventional Radiology](https://appshunter.io/developer/508819578) |

## What reviewers say

### 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


### SIR Guidelines

[App page](https://appshunter.io/ios/app/sir-guidelines/id1552455529)

Access evidence-based recommendations and tools for healthcare professionals. Features an interactive calculator for scenario-specific anticoagulation and antibiotic advice, simplifying clinical decision-making at the point of care.

**Highlights:** Access published guidelines and statements, Interactive periprocedural recommendation calculator, Scenario-specific anticoagulation and antibiotic recommendations, Tailored recommendations based on patient and procedural risk, Clinical Practice Guidelines for IVC Filters, Continual updates with new guidelines and tools

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ACR Guidance free?

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

### Is SIR Guidelines free?

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

### Which has better reviews, ACR Guidance or SIR Guidelines?

SIR Guidelines is rated higher. ACR Guidance averages 3.1 out of 5 from 12 ratings, while SIR Guidelines averages 5.0 from 23 ratings.

### Do ACR Guidance or SIR Guidelines have ads?

Neither ACR Guidance nor SIR Guidelines shows ads.

### Which is updated more often, ACR Guidance or SIR Guidelines?

ACR Guidance ships an update every 2 months, and SIR Guidelines every 3 weeks. Most recently, ACR Guidance was updated on October 24, 2026 and SIR Guidelines on October 24, 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.*