# STI Tx Guide vs ACR Guidance

The clearest difference is rating: STI Tx Guide at 3.5 against ACR Guidance's 3.1. STI Tx Guide also leads on review sentiment (36% vs 25%) and ratings volume (36 vs 12). On price, update cadence, 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.

STI Tx Guide holds the better App Store score, 3.5 against 3.1. Both are backed by a comparable volume of ratings — 36 and 12 respectively. Written reviews point the same way: 36% of STI Tx Guide's written reviews are positive against 25% of ACR Guidance's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | STI Tx Guide | ACR Guidance |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (36 ratings)](https://appshunter.io/ios/app/sti-tx-guide/id655206856/reviews)** | [3.1 (12 ratings)](https://appshunter.io/ios/app/acr-guidance/id1484701466/reviews) |
| Number of ratings | **36** | 12 |
| Positive reviews | **35.7% of reviews** | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 36 MB | 111 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 17+ |
| Developer | [Centers For Disease Control and Prevention](https://appshunter.io/developer/439259253) | [The American College of Radiology](https://appshunter.io/developer/493774954) |

## What reviewers say

### STI Tx Guide

[App page](https://appshunter.io/ios/app/sti-tx-guide/id655206856)

Provides healthcare professionals with up-to-date, evidence-based recommendations for the prevention, diagnosis, and treatment of sexually transmitted infections. Features include clinical care guidance, sexual history resources, and patient materials for effective patient management.

**Highlights:** STI prevention recommendations, Diagnosis guidance, Treatment protocols, Clinical care assistance, Sexual history resources, Patient management tools

**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 STI Tx Guide free?

STI Tx Guide is free to download, with no in-app purchases.

### Is ACR Guidance free?

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

### Which has better reviews, STI Tx Guide or ACR Guidance?

STI Tx Guide is rated higher. STI Tx Guide averages 3.5 out of 5 from 36 ratings, while ACR Guidance averages 3.1 from 12 ratings.

### Do STI Tx Guide or ACR Guidance have ads?

Neither STI Tx Guide nor ACR Guidance shows ads.

### Which is updated more often, STI Tx Guide or ACR Guidance?

STI Tx Guide ships an update every 2 months, and ACR Guidance every 2 months. Most recently, STI Tx Guide was updated on October 23, 2026 and ACR Guidance 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.*