Perinatal Calculators vs OB Wheel
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Perinatal Calculators
This app provides essential obstetrical and perinatal calculators for healthcare providers. It aids in patient counseling with tools for assessing risks like extreme prematurity and Down Syndrome, and managing conditions like gestational diabetes. All calculations are performed locally without an internet connection.
- Extreme prematurity calculator
- VBAC success calculators
- Down Syndrome risk assessment
- Gestational diabetes insulin calculation
- CCAMs CVR calculator
- Offline functionality
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Perinatal and obstetrical calculators derived from published data to help guide obstetrical providers in counseling patients. Calculators include: -Extreme prematurity calculator for fetuses 22-25 weeks gestational age -VBAC success calculator based on information available for counseling in the office setting -VBAC success calculator based on factors on admission including cervical exam -Assessment of risk of having a child with Down Syndrome -Insulin calculation for initiating insulin in a gestational diabetic -CVR calculator for CCAMs -MCA doppler MOM calculator -Umbilical artery doppler reference range calculator -Preterm VBAC calculator -Insulin adjustment for corticosteroids calculator DOES NOT REQUIRE INTERNET CONNECTION to use, all done locally on iPhone or iPad
OB Wheel
This app assists expectant mothers and healthcare professionals in tracking pregnancy with accurate due date calculations and weekly fetal development updates. It offers customizable features, health tips, and tools for clinicians to support patient care throughout the journey to delivery.
- Accurate due date calculation
- Weekly fetal development tracker
- Customizable reminders and tracking
- Health tips and resources
- Tools for healthcare professionals
- Symptom and feeling logging
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Promotional Text for OB Wheel App "Introducing the OB Wheel App – Your Personalized Pregnancy Journey Companion! Navigating through pregnancy just got easier and more reliable with the OB Wheel App, specially designed for expectant mothers and healthcare professionals. Say goodbye to guesswork and hello to precision with our user-friendly app that offers accurate, at-a-glance pregnancy tracking. Key Features: Accurate Due Date Calculation: Simply enter your last menstrual period, and let our app do the rest. Get precise due dates and important milestones at your fingertips. Fetal Development Tracker: Watch your baby's growth week-by-week. Learn about developmental stages, size comparisons, and exciting changes as your pregnancy progresses. Customizable Experience: Every pregnancy is unique. Customize the app to suit your journey – set reminders, track appointments, and record your feelings and symptoms. Health Tips & Resources: Stay informed with valuable insights, nutritional advice, and tips for maintaining a healthy pregnancy from conception to delivery. Professional Tools for Clinicians: A handy resource for obstetricians and midwives, offering gestational age calculations, weight and length estimations, and more to support patient care. Why Choose OB Wheel App? Simplicity and Ease of Use: Designed with you in mind, our app is intuitive and straightforward, making pregnancy tracking stress-free. Trusted and Reliable: Developed in collaboration with healthcare professionals, ensuring accuracy and up-to-date information. Stay Connected: Share milestones with loved ones and keep your healthcare team in the loop with easy sharing options. Embrace the beauty of pregnancy and enjoy peace of mind with the OB Wheel App. Whether you're a first-time mom or a seasoned pro, our app will be by your side every step of the way. Download now and start your extraordinary journey to motherhood with confidence and joy! Privacy policy: https://odindevstudio.wordpress.com/privacy-policy Terms of use and Terms of Subscription https://odindevstudio.wordpress.com/terms
Screenshots
Verdict
The clearest difference is rating: Perinatal Calculators at 5.0 against OB Wheel's 4.3. Perinatal Calculators also leads on in-app purchases (none vs 2). OB Wheel's advantage is update cadence (every 4 days vs monthly) and ratings volume (10 vs 2). On price, ads, monetization model and device support 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. OB Wheel sells 2 one-off in-app purchases. Perinatal Calculators asks for nothing beyond the download.
Perinatal Calculators holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: OB Wheel has 10 ratings behind it against 2, so its average is the more settled of the two.
Perinatal Calculators ships an update monthly, OB Wheel every 4 days. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.
| Parameter | Perinatal Calculators | OB Wheel |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 4.3 (10 ratings) |
| Number of ratings | 2 | 10 — better |
| Update frequency | Monthly | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 14.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 28 MB |
| Age rating | 4+ | 17+ |
| Developer | David Deschamps | Berkay Gurcesme |
Customer experience
Perinatal Calculators
OB Wheel
In-app purchases
Perinatal Calculators
No in-app purchases
OB Wheel
- Ob Wheel lifetime ad-free$3.99
- Unlimited Ad-free Ob wheel$9.99
Questions
Is Perinatal Calculators free?
Is OB Wheel free?
Which has better reviews, Perinatal Calculators or OB Wheel?
Do Perinatal Calculators or OB Wheel have ads?
Which is updated more often, Perinatal Calculators or OB Wheel?
Other comparisons
