# ACR Guidance vs Opymize

The clearest difference is ads: ACR Guidance at none against Opymize's shown. Opymize's advantage is update cadence (fortnightly vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

ACR Guidance ships an update every 2 months, Opymize fortnightly. The most recent releases landed on October 17, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | ACR Guidance | Opymize |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.1 (12 ratings)](https://appshunter.io/ios/app/acr-guidance/id1484701466/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 111 MB | 13 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [The American College of Radiology](https://appshunter.io/developer/493774954) | [Tamim Khaddash](https://appshunter.io/developer/1870139090) |

## 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


### Opymize

[App page](https://appshunter.io/ios/app/opymize/id6765965620)

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

**In-app purchases:** none


## Frequently asked questions

### Is ACR Guidance free?

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

### Is Opymize free?

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

### Do ACR Guidance or Opymize have ads?

Opymize shows ads; ACR Guidance does not.

### Which is updated more often, ACR Guidance or Opymize?

ACR Guidance ships an update every 2 months, and Opymize fortnightly. Most recently, ACR Guidance was updated on October 17, 2026 and Opymize on October 9, 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.*