# STI Tx Guide vs Lab Values Pro

The clearest difference is price: STI Tx Guide at Free against Lab Values Pro's $0.99. STI Tx Guide also leads on review sentiment (36% vs 0%) and ratings volume (36 vs 3). Lab Values Pro's advantage is rating (4.0 vs 3.5) and device support (3 vs 1). On update cadence, ads and in-app purchases there is nothing between them.

STI Tx Guide is free to download; Lab Values Pro costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Lab Values Pro holds the better App Store score, 4.0 against 3.5. That said, the two scores are not equally well evidenced: STI Tx Guide has 36 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 36% of STI Tx Guide's written reviews are positive against 0% of Lab Values Pro's, so the app with the better star average is not the one people write more warmly about.

STI Tx Guide ships an update every 8 months, Lab Values Pro every 10 months. Both last shipped on November 11, 2026.

## The numbers

| Metric | STI Tx Guide | Lab Values Pro |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [3.5 (36 ratings)](https://appshunter.io/ios/app/sti-tx-guide/id655206856/reviews) | **[4.0 (3 ratings)](https://appshunter.io/ios/app/lab-values-pro/id1396676594/reviews)** |
| Number of ratings | **36** | 3 |
| Positive reviews | **35.7% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 months** | Every 10 months |
| Monetization | **Free** | Paid |
| Size | 31 MB | 12 MB |
| Requires iOS | 18.0 | **12.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 12+ | 17+ |
| Developer | [Centers For Disease Control and Prevention](https://appshunter.io/developer/439259253) | [Dr. Steve Müller](https://appshunter.io/developer/435712210) |

## 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.

**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


### Lab Values Pro

[App page](https://appshunter.io/ios/app/lab-values-pro/id1396676594)

This app provides a clear and structured overview of common laboratory blood values, their standard ranges in both old and SI units, and potential causes for increases or decreases. It's designed for quick navigation and understanding for both medical professionals and laypeople.

**Highlights:** Overview of routine lab parameters, Causes of increased/decreased values, Standard values in old and SI units, Alphabetical and category-based navigation, Search bar for specific values, Generally understandable information

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

**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 Lab Values Pro free?

Lab Values Pro costs $0.99, with no in-app purchases.

### Which has better reviews, STI Tx Guide or Lab Values Pro?

Lab Values Pro is rated higher. STI Tx Guide averages 3.5 out of 5 from 36 ratings, while Lab Values Pro averages 4.0 from 3 ratings.

### Do STI Tx Guide or Lab Values Pro have ads?

Neither STI Tx Guide nor Lab Values Pro shows ads.

### Which is updated more often, STI Tx Guide or Lab Values Pro?

STI Tx Guide ships an update every 8 months, and Lab Values Pro every 10 months. Most recently, STI Tx Guide was updated on November 11, 2026 and Lab Values Pro on November 11, 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.*