Preg Wheel vs STI Tx Guide
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Preg Wheel
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.
- 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
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Simple and fast pregnancy wheel available for the iPhone, No need to carry a paper wheel. The best part is the app is completely free. Features ------------------------------- 1) Quickly input various dates with the date wheel: • Last menstrual period (LMP) • Estimated date of delivery (EDD) • Estimated Gestational Age (EGA) • IVF dates 2) Accurate results: Preg Wheel provides exact dates and accounts for all calendar variance, including leap years. 3) Persistence: Preg Wheel can save the date and date type and restore them when launched to streamline your workflow. 4) Now with even more relevant dates for the entire pregnancy. Know in advance when specific screening tests need to be performed. • 1st Trimesters US • CVS • Quad Screen • Amino • Anatomy US • GTT • Anti-D Prophylaxis • GBS Screen • Elective Delivery
STI Tx Guide
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.
- STI prevention recommendations
- Diagnosis guidance
- Treatment protocols
- Clinical care assistance
- Sexual history resources
- Patient management tools
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The new app offers quick and easy access to streamlined STI prevention, diagnosis, and treatment recommendations. The user-friendly interface includes more clinical care guidance, sexual history resources, patient materials, and other features to assist with patient management. The STI Treatment (Tx) Guidelines mobile app serves as a quick reference guide for doctors and related parties on the identification of and treatment for sexually transmitted diseases (STDs). The full STI Treatment Guidelines (cdc.gov) can be accessed at https://www.cdc.gov/std/treatment-guidelines/default.htm. The guidelines provide current evidence-based prevention, diagnostic and treatment recommendations that replace the 2015 guidance. The recommendations are intended to be a source for clinical guidance. Healthcare providers should always assess patients based on their clinical circumstances and local burden. DISCLAIMER THE MATERIALS EMBODIED IN THIS SOFTWARE IS PROVIDED TO YOU "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE CENTERS FOR DISEASE CONTROL AND PREVENTION (CDC) OR THE UNITED STATES (U.S.) GOVERNMENT BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT, SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION, LOSS OF PROFIT, LOSE OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF THIRD PARTIES, WHETHER OR NOT CDC OR THE U.S. GOVERNMENT HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Preg Wheel | STI Tx Guide |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (62 ratings) — better | 3.5 (36 ratings) |
| Positive reviews | 58.6% of reviews — better | 35.7% of reviews |
| Number of ratings | 62 — better | 36 |
| Update frequency | Every 9 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 10.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 24 MB | 36 MB |
| Age rating | 17+ | 12+ |
| Developer | Andrew Yu | Centers For Disease Control and Prevention |
Customer experience
Preg Wheel
STI Tx Guide
Bugs and requests
Preg Wheel
Reported bugs
13 issues- 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
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- App not compatible with iOS 7
- App not working after iPhone updates
- App crashes or shuts down
- Gestational weeks are wrong
- All numbers came up wrong
- Does not work on iPad anymore
- Freezes phone
- Instant shutdown
Requested features
5 requests- Update for latest iOS
- Update IVF dating function
- Add FTS window
- Ensure compatibility with newer devices/OS
- Local time zone support
STI Tx Guide
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Preg Wheel
No in-app purchases
STI Tx Guide
No in-app purchases
Questions
Is Preg Wheel free?
Is STI Tx Guide free?
Which has better reviews, Preg Wheel or STI Tx Guide?
Do Preg Wheel or STI Tx Guide have ads?
Which is updated more often, Preg Wheel or STI Tx Guide?
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