# STI Tx Guide vs CVD Risk Estimator Plus

The clearest difference is rating: CVD Risk Estimator Plus at 5.0 against STI Tx Guide's 3.5. CVD Risk Estimator Plus also leads on iOS requirement (13.0 vs 15.0). STI Tx Guide's advantage is ratings volume (36 vs 1). On price, review sentiment, update cadence and ads there is nothing between them.

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

CVD Risk Estimator Plus holds the better App Store score, 5.0 against 3.5. That said, the two scores are not equally well evidenced: STI Tx Guide has 36 ratings behind it against 1, 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 32% of CVD Risk Estimator Plus'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 2 months, CVD Risk Estimator Plus every 4 months. Both last shipped on October 17, 2026.

## The numbers

| Metric | STI Tx Guide | CVD Risk Estimator Plus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.5 (36 ratings)](https://appshunter.io/ios/app/sti-tx-guide/id655206856/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cvd-risk-estimator-plus/id808875968/reviews)** |
| Number of ratings | **36** | 1 |
| Positive reviews | **35.7% of reviews** | 31.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Free | Free |
| Size | 36 MB | 59 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 17+ |
| Developer | [Centers For Disease Control and Prevention](https://appshunter.io/developer/439259253) | [American College of Cardiology](https://appshunter.io/developer/502174543) |

## 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


### CVD Risk Estimator Plus

[App page](https://appshunter.io/ios/app/cvd-risk-estimator-plus/id808875968)

This clinical decision support app provides comprehensive cardiovascular disease risk assessments for clinicians. It unifies two major risk calculators, incorporating traditional ASCVD modeling with modern kidney and metabolic health measures for personalized patient care.

**Highlights:** Combines ASCVD and PREVENT calculators, Calculates 10-year and lifetime CVD risk, Incorporates kidney and metabolic health, Provides risk category classification, Exports results for documentation, Includes clinician and patient resources

**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 CVD Risk Estimator Plus free?

CVD Risk Estimator Plus is free to download, with no in-app purchases.

### Which has better reviews, STI Tx Guide or CVD Risk Estimator Plus?

CVD Risk Estimator Plus is rated higher. STI Tx Guide averages 3.5 out of 5 from 36 ratings, while CVD Risk Estimator Plus averages 5.0 from 1 ratings.

### Do STI Tx Guide or CVD Risk Estimator Plus have ads?

Neither STI Tx Guide nor CVD Risk Estimator Plus shows ads.

### Which is updated more often, STI Tx Guide or CVD Risk Estimator Plus?

STI Tx Guide ships an update every 2 months, and CVD Risk Estimator Plus every 4 months. Most recently, STI Tx Guide was updated on October 17, 2026 and CVD Risk Estimator Plus on October 17, 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.*