Obstetrical Calculator vs OB Calc (cloud)
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Obstetrical Calculator
This medical application provides essential calculations for obstetrics. It serves as a clinical support tool, but all results require confirmation by a healthcare professional. It is not a replacement for professional medical judgment.
- Obstetrical calculations
- Clinical support tool
- Requires professional confirmation
- Supports iOS devices
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Obstetrical Calculator updates for ios *.02 All calculations must be confirmed before use. The suggested results are not a substitute for clinical judgment. Neither expresoweb.com nor any other party involved in the preparation or publication of this site shall be liable for any special, consequential, or exemplary damages resulting in whole or part from any user's use of or reliance upon this material
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 ads: OB Calc (cloud) at none against Obstetrical Calculator's shown. OB Calc (cloud) also leads on update cadence (every 3 months vs every 20 months). Obstetrical Calculator's advantage is iOS requirement (16.0 vs 18.0). On price, review sentiment, 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. Obstetrical Calculator sells 4 one-off in-app purchases and OB Calc (cloud) sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
Obstetrical Calculator ships an update every 20 months, OB Calc (cloud) every 3 months. The most recent releases landed on September 29, 2026 and October 25, 2026 respectively.
| Parameter | Obstetrical Calculator | OB Calc (cloud) |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (5 ratings) — better |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| Number of ratings | — | 5 — better |
| Update frequency | Every 20 months | Every 3 months — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, Mac — better |
| Requires iOS | 16.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 4 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Manuel Posadas | Glen Botha |
Customer experience
Obstetrical Calculator
OB Calc (cloud)
In-app purchases
Obstetrical Calculator
- Give a little$0.99
- Remove Advertisements$0.99
- Give a lot$4.99
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- Make my day$9.99
OB Calc (cloud)
- Monthly Subscription$2.991 Month
- Premium (Annual)$29.991 Year
Questions
Is Obstetrical Calculator free?
Is OB Calc (cloud) free?
Do Obstetrical Calculator or OB Calc (cloud) have ads?
Which is updated more often, Obstetrical Calculator or OB Calc (cloud)?
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