Perinatal Calculators vs OB Calc (cloud)
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 Calc (cloud)
This medical app helps obstetricians efficiently calculate key patient test date windows. It offers multiple calculation methods and allows for saving patient data and generating PDF reports. A free trial is available, followed by a subscription for full access.
- LMP, EDC, Ultrasound, CRL, and IVF calculations
- Customizable test date ranges
- Cross-device data syncing
- PDF report generation
- Save individual patient data
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While similar to a pregnancy wheel, OB Calc (cloud) is specifically designed by an obstetrician, for obstetricians. Finally obstetricians have an efficient and simple method to calculate the important test date windows for patients. CALCULATION METHODS • Last Menstrual Period (LMP) • Expected Delivery Date (EDC) • Sonogram Date and Fetal Age (Sonogram) • Crown Rump Length (CRL) • In Vitro Fertilization (IVF) Try the app for free for 7 days. A low monthly autorenewable subscription gives users access to premium features such as all calculation methods and saving of individual patient data. You can reach the developer directly at support@inpocketsolutions.com FEATURES • LMP, EDC, Ultrasound, CRL and IVF Method Calculations • Customize up to 15 tests, with date ranges • Data synced across multiple devices • Generate a PDF file • Save individual patient data CRL data reference : https://obgyn.onlinelibrary.wiley.com/doi/pdf/10.1002/uog.7654 Terms & Conditions: https://inpocketsolutions.com/terms ** Disclaimer Remember to test out the app on your specific device to ensure calculations are verified to your expectation.
Screenshots
Verdict
The clearest difference is in-app purchases: Perinatal Calculators at none against OB Calc (cloud)'s 2. Perinatal Calculators also leads on update cadence (monthly vs every 3 months) and iOS requirement (15.6 vs 18.0). On price, rating, ratings volume and ads 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 Calc (cloud) sells 2 in-app purchases, starting at $2.99 per month. Perinatal Calculators asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Perinatal Calculators against 5.0 for OB Calc (cloud). Both are backed by a comparable volume of ratings — 2 and 5 respectively.
Perinatal Calculators ships an update monthly, OB Calc (cloud) every 3 months. The most recent releases landed on September 24, 2026 and October 25, 2026 respectively.
| Parameter | Perinatal Calculators | OB Calc (cloud) |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (5 ratings) |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | 2 | 5 — better |
| Update frequency | Monthly — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 15.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 2 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | David Deschamps | Glen Botha |
Customer experience
Perinatal Calculators
OB Calc (cloud)
In-app purchases
Perinatal Calculators
No in-app purchases
OB Calc (cloud)
- Monthly Subscription$2.991 Month
- Premium (Annual)$29.991 Year
Questions
Is Perinatal Calculators free?
Is OB Calc (cloud) free?
Which has better reviews, Perinatal Calculators or OB Calc (cloud)?
Do Perinatal Calculators or OB Calc (cloud) have ads?
Which is updated more often, Perinatal Calculators or OB Calc (cloud)?
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