# STI Tx Guide vs EFM

The clearest difference is rating: STI Tx Guide at 3.5 against EFM's 1.0. STI Tx Guide also leads on review sentiment (36% vs 0%) and update cadence (every 2 months vs every 12 months). EFM's advantage is iOS requirement (7.0 vs 15.0). 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.

STI Tx Guide holds the better App Store score, 3.5 against 1.0. That said, the two scores are not equally well evidenced: STI Tx Guide has 36 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 36% of STI Tx Guide's written reviews are positive against 0% of EFM's.

STI Tx Guide ships an update every 2 months, EFM every 12 months. The most recent releases landed on August 28, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | STI Tx Guide | EFM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (36 ratings)](https://appshunter.io/ios/app/sti-tx-guide/id655206856/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/efm/id834501088/reviews) |
| Number of ratings | **36** | 2 |
| Positive reviews | **35.7% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 12 months |
| Monetization | Free | Free |
| Size | 36 MB | 5 MB |
| Requires iOS | 15.0 | **7.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 12+ |
| Developer | [Centers For Disease Control and Prevention](https://appshunter.io/developer/439259253) | [Augusta University](https://appshunter.io/developer/319778530) |

## 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


### EFM

[App page](https://appshunter.io/ios/app/efm/id834501088)

This is an instructional application for learning electronic fetal monitoring using a recognized algorithm and nomenclature. It is designed for educational purposes and is not a substitute for professional clinical judgment. Future updates aim to include data saving and demographic features.

**Highlights:** Electronic fetal monitoring instruction, NCHHD algorithm and nomenclature, Instructional purposes, Collaborative project inquiries, Future data saving capability

**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 EFM free?

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

### Which has better reviews, STI Tx Guide or EFM?

STI Tx Guide is rated higher. STI Tx Guide averages 3.5 out of 5 from 36 ratings, while EFM averages 1.0 from 2 ratings.

### Do STI Tx Guide or EFM have ads?

Neither STI Tx Guide nor EFM shows ads.

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

STI Tx Guide ships an update every 2 months, and EFM every 12 months. Most recently, STI Tx Guide was updated on August 28, 2026 and EFM on September 29, 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.*