Comparison

OB Calc (cloud) vs Obstetric Tools

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

Obstetric Tools

This clinical toolkit provides obstetricians and midwives with a precise, fast, and comprehensive pregnancy wheel and calculator. It offers evidence-based results for optimizing patient care, even offline, and includes various essential medical tests and scales.

Highlights
  • Advanced Gestogram (Pregnancy Wheel)
  • Estimated Due Date (EDD) & Gestational Age (GA) calculation
  • Estimated Fetal Weight (EFW) calculator
  • Maternal BMI & Weight Gain tracker
  • Bishop Score, Apgar Score, and other clinical scales
  • 100% Offline Functionality
  • Evidence-based clinical information
Features
Read full description

Keep obstetric and neonatal reference tools together, from pregnancy dating to newborn assessment. Obstetric Tools is designed for midwives, obstetricians and other healthcare professionals. PREGNANCY AND MATERNAL CARE Use the pregnancy wheel to calculate gestational age and estimated due date. Explore IVF dating, estimated fetal weight with Hadlock IV, BMI and pregnancy weight gain, serial beta-hCG change, amniotic fluid assessment, twin weight discordance, mean arterial pressure and blood loss calculations. NEWBORN CARE AND CLINICAL SCALES Find Apgar, Bishop, Silverman-Andersen, Edinburgh, PUQE-24, LATCH and other reference scales. Calculate corrected age and newborn weight change. Search the tool catalog and open explanations, reference tables and sources from each tool. FREE TOOLS AND OPTIONAL PRO Use the available free tools or choose an individual monthly or annual auto-renewing Pro subscription for all Pro tools and an ad-free experience. The store shows the price and billing period before purchase. Manage or cancel renewal in your store settings. No app account is required. PRIVACY AND CLINICAL USE Clinical calculations run on your device. Technical usage, purchase and diagnostic data are described in the privacy policy; clinical inputs are not included in analytics events. For professional information and education. This app is not a medical device and does not diagnose, prescribe or replace clinical judgement. Check results against the clinical context, original references and your local protocols. Privacy: https://milkynest.com/privacy/ EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

OB Calc (cloud)4 screens
Obstetric Tools4 screens

Verdict

The call

The clearest difference is ads: OB Calc (cloud) at none against Obstetric Tools's shown. OB Calc (cloud) also leads on rating (5.0 vs 4.8). Obstetric Tools's advantage is update cadence (every 3 weeks vs every 3 months) and iOS requirement (15.1 vs 18.0). On price, ratings volume, 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 Obstetric Tools sells 4 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

OB Calc (cloud) holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 5 and 4 respectively.

UpkeepUpdate frequency

OB Calc (cloud) ships an update every 3 months, Obstetric Tools every 3 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

Scorecard4 real differences · 6 level
OB Calc (cloud) versus Obstetric Tools: the parameters behind the verdict, then further details
ParameterOB Calc (cloud)Obstetric Tools
PriceFreeFree
Rating5.0 (5 ratings) — better4.8 (4 ratings)
Positive reviews0.0% of reviews—
Number of ratings5 — better4
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS18.015.1 — better
Further details — not scored
Size14 MB69 MB
Age rating4+17+
DeveloperGlen BothaPedro Iniesta

Customer experience

OB Calc (cloud)

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

Obstetric Tools

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

OB Calc (cloud)

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

Obstetric Tools

Subscriptions4
  • Premium Monthly7 Days trial$1.991 Month
  • Obstetric Tools Pro Monthly$3.991 Month
  • Premium Annual7 Days trial$4.991 Year
Show 1 more
  • Obstetric Tools Pro Annual$24.991 Year

Questions

Is OB Calc (cloud) free?
OB Calc (cloud) is free to download, with in-app purchases available.
Is Obstetric Tools free?
Obstetric Tools is free to download, with in-app purchases available.
Which has better reviews, OB Calc (cloud) or Obstetric Tools?
OB Calc (cloud) is rated higher. OB Calc (cloud) averages 5.0 out of 5 from 5 ratings, while Obstetric Tools averages 4.8 from 4 ratings.
Do OB Calc (cloud) or Obstetric Tools have ads?
Obstetric Tools shows ads; OB Calc (cloud) does not.
Which is updated more often, OB Calc (cloud) or Obstetric Tools?
OB Calc (cloud) ships an update every 3 months, and Obstetric Tools every 3 weeks. Most recently, OB Calc (cloud) was updated on November 3, 2026 and Obstetric Tools on October 30, 2026.

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