Comparison

OB Calc (cloud) vs Obstetrics Calculator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • LMP, EDC, Ultrasound, CRL, and IVF calculations
  • Customizable test date ranges
  • Cross-device data syncing
  • PDF report generation
  • Save individual patient data
Features
Read full description

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.

About

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.

Highlights
  • 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
Features
Read full description

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

OB Calc (cloud)4 screens
Obstetrics Calculator4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

OB Calc (cloud) ships an update every 3 months, Obstetrics Calculator every 2 months. Both last shipped on November 11, 2026.

Scorecard5 real differences · 5 level
OB Calc (cloud) versus Obstetrics Calculator: the parameters behind the verdict, then further details
ParameterOB Calc (cloud)Obstetrics Calculator
PriceFreeFree
Rating5.0 (5 ratings)5.0 (1 ratings)
Positive reviews0.0% of reviews54.5% of reviews — better
Number of ratings5 — better1
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS18.013.0 — better
Further details — not scored
Size14 MB90 MB
Age rating4+12+
DeveloperGlen BothaAlexander Snegirev

Customer experience

OB Calc (cloud)

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Obstetrics Calculator

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews11 reviews
Positive54.5%
Neutral36.4%
Negative9.1%

In-app purchases

2 purchases

OB Calc (cloud)

Subscriptions2
  • Monthly Subscription$2.991 Month
  • Premium (Annual)$29.991 Year
2 purchases

Obstetrics Calculator

Subscriptions1
  • ObCalc Pro$1.991 Month
One-time1
  • Disable Ads$10.99

Questions

Is OB Calc (cloud) free?
OB Calc (cloud) is free to download, with in-app purchases available.
Is Obstetrics Calculator free?
Obstetrics Calculator is free to download, with in-app purchases available.
Which has better reviews, OB Calc (cloud) or Obstetrics Calculator?
OB Calc (cloud) and Obstetrics Calculator are both rated 5.0 out of 5 on the App Store, from 5 and 1 ratings respectively.
Do OB Calc (cloud) or Obstetrics Calculator have ads?
Obstetrics Calculator shows ads; OB Calc (cloud) does not.
Which is updated more often, OB Calc (cloud) or Obstetrics Calculator?
OB Calc (cloud) ships an update every 3 months, and Obstetrics Calculator every 2 months. Most recently, OB Calc (cloud) was updated on November 11, 2026 and Obstetrics Calculator on November 11, 2026.

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