OB Calc (cloud) vs Obstetrics Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
Obstetrics Calculator
This medical app provides a comprehensive suite of tools for calculating gestational age, estimated due dates, and various risk assessments related to pregnancy and women's health. It includes calculators for maternity leave, cervical assessments, and cancer risk estimations, designed for healthcare professionals.
- Gestational age and due date calculation
- Multiple calculation methods (LMP, ultrasound, IVF)
- Maternity leave timeframe estimation
- Bishop Score and TOLAC probability
- Cancer risk estimations (Breast, Cervical, Ovarian)
- Follow-up after colposcopy
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Obstetric Calculator will help you determine gestational age in weeks and days as well as estimated due date using last menstrual period, ultrasound report, ovulation/IVF and other methods. This set of tools ans scales contains: - Estimated Due Date & Gestational Age by First Day of Last Menstrual Period - Estimated Due Date & Gestational Age by Ultrasound Report - Estimated Due Date & Gestational Age by Conception Date - Estimated Due Date & Gestational Age by Quickening (= Fetal Movements) - Estimated Due Date & Gestational Age from Given Date - Timeframe for Maternity Leave - Gestational Age & last menstrual period from Estimated Due Date - Gestational Age by Crown-Rump Length - Gestational Age by Fetal Biometry - Estimated Fetal Weight by Mother's Biometry - Bishop Score (Quick Cervix Assessment) - Probability of Successful Vaginal Birth after Cesarean Section (or Trial of Labor) - Breast Cancer Risk Estimation (Gail Model) - Cervical Cancer Risk Estimation (ASCCP 2019 Guidelines) - Ovarian Cancer Risk (O-RADS, ADNEX, ROMA) - Follow-Up after Colposcopy/Treatment of CIN Each tool is provided with instructions ("i" in the upper right corner). This app was designed for educational use by health care providers in the field of Obstetrics & Gynecology.
Screenshots
Verdict
OB Calc (cloud) and Obstetrics Calculator both sit at 5.0 stars, but that hides the real split: 55% of Obstetrics Calculator's written reviews are positive against 0% of OB Calc (cloud)'s. Obstetrics Calculator also leads on update cadence (every 2 months vs every 3 months) and iOS requirement (13.0 vs 18.0). OB Calc (cloud)'s advantage is ads (none vs shown) and ratings volume (5 vs 1). On price, rating, 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. OB Calc (cloud) sells 2 in-app purchases, starting at $2.99 per month and Obstetrics Calculator sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for OB Calc (cloud) against 5.0 for Obstetrics Calculator. That said, the two scores are not equally well evidenced: OB Calc (cloud) has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 0% of OB Calc (cloud)'s written reviews are positive against 55% of Obstetrics Calculator's.
OB Calc (cloud) ships an update every 3 months, Obstetrics Calculator every 2 months. Both last shipped on November 11, 2026.
| Parameter | OB Calc (cloud) | Obstetrics Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) | 5.0 (1 ratings) |
| Positive reviews | 0.0% of reviews | 54.5% of reviews — better |
| Number of ratings | 5 — better | 1 |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 18.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 14 MB | 90 MB |
| Age rating | 4+ | 12+ |
| Developer | Glen Botha | Alexander Snegirev |
Customer experience
OB Calc (cloud)
Obstetrics Calculator
In-app purchases
OB Calc (cloud)
- Monthly Subscription$2.991 Month
- Premium (Annual)$29.991 Year
Obstetrics Calculator
- ObCalc Pro$1.991 Month
- Disable Ads$10.99
Questions
Is OB Calc (cloud) free?
Is Obstetrics Calculator free?
Which has better reviews, OB Calc (cloud) or Obstetrics Calculator?
Do OB Calc (cloud) or Obstetrics Calculator have ads?
Which is updated more often, OB Calc (cloud) or Obstetrics Calculator?
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