ACOG vs OB Wheels
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ACOG
This app provides obstetricians and gynecologists with essential tools and resources for women's healthcare. Access clinical guidelines, practice advisories, and helpful calculators to support your medical practice.
- EDD Calculator
- Indicated Delivery tool (members only)
- Clinical Consensus documents
- Clinical Practice Guidelines
- Practice Advisories
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The American College of Obstetricians and Gynecologists Ob-Gyns: Download the ACOG app and stay connected with authoritative information from the leading experts in women’s health care. Get valuable tools, resources, and clinical guidelines to help you in your practice. • EDD Calculator – Calculate the due date according to guidelines jointly developed by ACOG, AIUM, and SMFM • Indicated Delivery (ACOG members only) – Provides members with suggestions related to the timing of delivery based on selected conditions, the patient’s EDD/EGA, and ACOG’s clinical guidance • Clinical Consensus, Clinical Practice Guidelines, and Practice Advisories – Get the latest on techniques, clinical management issues, and emerging issues in obstetric and gynecologic practice • And more!
OB Wheels
This app calculates due dates, gestational age, and reconciles sonogram and LMP dates using a digital OB wheel and calendar. It offers a familiar interactive wheel for precise date calculations, accounting for leap years.
- Calendar calculator for EDD/EDC
- Gestational age calculation
- Interactive digital OB wheel
- Reconciliation of due dates
- Leap year accuracy
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Does the world need another OB-wheel-due-date-calculator app? You bet! OB Wheels combines three things that clinicians need to derive all the dates necessary in pregnancy care, and no other app has this combination. It contains a calendar calculator to determine EDD (EDC) from LMP or from a sonogram report. The calendar calculator also provides gestational age (EGA) as of any date for a given EDD or LMP. Because the calculator works off the real calendar, it is accurate for leap years too. Then for all of you who miss your cardboard OB wheel, the app contains one which you can rotate, pinch and zoom, and generally play with just like a regular cardboard wheel. It's a little tricky to learn how to plant two fingers and rotate them rather than pinch-and-zoom to get rotation versus resizing. But the wheel works and it is accurate, especially so because you can zoom in to be sure where the little date hash lines lie. Finally, the app notes the most recent committee opinion scheme from ACOG on how one might reconcile due dates from LMP and sonograms to arrive at a single final EDD. To my knowledge, the scheme is authority-based and no better or worse than other schemes, but my practice and my learners need a single clear scheme, so this app includes one for easy reference. As an educator and clinician myself, I am grateful for feedback. Email me via the contact email at my website.
Screenshots
Verdict
The clearest difference is review sentiment: ACOG at 90% against OB Wheels's 20%. ACOG also leads on rating (4.9 vs 2.3) and ratings volume (6.3K vs 15). OB Wheels's advantage is iOS requirement (7.0 vs 17.0). On price, ads, in-app purchases and monetization model 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.
ACOG holds the better App Store score, 4.9 against 2.3. That said, the two scores are not equally well evidenced: ACOG has 6.3K ratings behind it against 15, so its average is the more settled of the two. Written reviews point the same way: 90% of ACOG's written reviews are positive against 20% of OB Wheels's.
ACOG ships an update every 3 months, OB Wheels every 18 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.
| Parameter | ACOG | OB Wheels |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (6.3K ratings) — better | 2.3 (15 ratings) |
| Positive reviews | 89.6% of reviews — better | 20.0% of reviews |
| Number of ratings | 6.3K — better | 15 |
| Update frequency | Every 3 months — better | Every 18 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.0 | 7.0 — better |
| Further details — not scored | ||
| Size | 29 MB | 3 MB |
| Age rating | 17+ | 17+ |
| Developer | Fountainhead Mobile Solutions | Joshua D. steinberg |
Customer experience
ACOG
OB Wheels
Bugs and requests
ACOG
Reported bugs
2 issues- App crashes on launch after updates
- Compatibility issues with older iOS versions
Requested features
3 requests- Bishop score calculator
- More extensive search engine
- Improved user interface
OB Wheels
Not enough reviews yet to summarise bugs or requests.
In-app purchases
ACOG
No in-app purchases
OB Wheels
No in-app purchases









