# Preg Wheel vs STI Tx Guide

The clearest difference is rating: Preg Wheel at 4.0 against STI Tx Guide's 3.5. Preg Wheel also leads on review sentiment (59% vs 36%) and iOS requirement (10.0 vs 15.0). STI Tx Guide's advantage is update cadence (every 2 months vs every 9 months). On price, ratings volume, 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.

Preg Wheel holds the better App Store score, 4.0 against 3.5. Both are backed by a comparable volume of ratings — 62 and 36 respectively. Written reviews point the same way: 59% of Preg Wheel's written reviews are positive against 36% of STI Tx Guide's.

Preg Wheel ships an update every 9 months, STI Tx Guide every 2 months. The most recent releases landed on October 15, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Preg Wheel | STI Tx Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (62 ratings)](https://appshunter.io/ios/app/preg-wheel/id445303968/reviews)** | [3.5 (36 ratings)](https://appshunter.io/ios/app/sti-tx-guide/id655206856/reviews) |
| Number of ratings | **62** | 36 |
| Positive reviews | **58.6% of reviews** | 35.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 24 MB | 36 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Andrew Yu](https://appshunter.io/developer/328693314) | [Centers For Disease Control and Prevention](https://appshunter.io/developer/439259253) |

## What reviewers say

### Preg Wheel

[App page](https://appshunter.io/ios/app/preg-wheel/id445303968)

This app provides a digital pregnancy wheel for iPhone users, eliminating the need for a physical one. It allows for quick input of key dates and offers accurate results, accounting for calendar variations. The app also saves your information for future use and includes important dates for screenings throughout the pregnancy.

**Highlights:** Input LMP, EDD, EGA, and IVF dates, Accurate date calculations with leap year support, Save and restore input dates, Track important screening test dates, View dates for 1st Trimester US, CVS, Quad Screen, and more

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and easy to use
- 🚀 Fast calculations
- ✅ Accurate results
- 👍 Great for medical professionals
- 👍 Efficient paper wheel alternative

**What reviewers complain about**

- 🐛 Not updated for latest iOS
- 🐛 Functionality issues after updates
- 🐛 IVF dating function not working
- 🐛 Inconsistent calculations
- 🐛 App crashes/shuts down

**Reported bugs**

- IVF dating function does not work
- Cannot calculate due date based on weeks and ultrasound date
- LMP does not change when due date is entered, and vice versa
- App not compatible with iOS 14
- App not compatible with iOS 11

**Requested features**

- Update for latest iOS
- Update IVF dating function
- Add FTS window
- Ensure compatibility with newer devices/OS
- Local time zone support


### 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


## Frequently asked questions

### Is Preg Wheel free?

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

### Is STI Tx Guide free?

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

### Which has better reviews, Preg Wheel or STI Tx Guide?

Preg Wheel is rated higher. Preg Wheel averages 4.0 out of 5 from 62 ratings, while STI Tx Guide averages 3.5 from 36 ratings.

### Do Preg Wheel or STI Tx Guide have ads?

Neither Preg Wheel nor STI Tx Guide shows ads.

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

Preg Wheel ships an update every 9 months, and STI Tx Guide every 2 months. Most recently, Preg Wheel was updated on October 15, 2026 and STI Tx Guide 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.*