Comparison

Obstetrical Calculator vs OB Calc (cloud)

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

Head to head
About

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.

Highlights
  • Obstetrical calculations
  • Clinical support tool
  • Requires professional confirmation
  • Supports iOS devices
Features
Read full description

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

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.

Screenshots

Obstetrical Calculator4 screens
OB Calc (cloud)4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
Obstetrical Calculator versus OB Calc (cloud): the parameters behind the verdict, then further details
ParameterObstetrical CalculatorOB Calc (cloud)
PriceFreeFree
Rating—5.0 (5 ratings) — better
Positive reviews0.0% of reviews0.0% of reviews
Number of ratings—5 — better
Update frequencyEvery 20 monthsEvery 3 months — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, Mac — better
Requires iOS16.0 — better18.0
Further details — not scored
Size4 MB14 MB
Age rating4+4+
DeveloperManuel PosadasGlen Botha

Customer experience

Obstetrical Calculator

Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

OB Calc (cloud)

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

In-app purchases

4 purchases

Obstetrical Calculator

One-time4
  • Give a little$0.99
  • Remove Advertisements$0.99
  • Give a lot$4.99
Show 1 more
  • Make my day$9.99
2 purchases

OB Calc (cloud)

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

Questions

Is Obstetrical Calculator free?
Obstetrical Calculator is free to download, with in-app purchases available.
Is OB Calc (cloud) free?
OB Calc (cloud) is free to download, with in-app purchases available.
Do Obstetrical Calculator or OB Calc (cloud) have ads?
Obstetrical Calculator shows ads; OB Calc (cloud) does not.
Which is updated more often, Obstetrical Calculator or OB Calc (cloud)?
Obstetrical Calculator ships an update every 20 months, and OB Calc (cloud) every 3 months. Most recently, Obstetrical Calculator was updated on September 29, 2026 and OB Calc (cloud) on October 25, 2026.

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