Comparison

OB Calc (cloud) vs OB Wheel

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

OB Wheel

This app assists expectant mothers and healthcare professionals in tracking pregnancy with accurate due date calculations and weekly fetal development updates. It offers customizable features, health tips, and tools for clinicians to support patient care throughout the journey to delivery.

Highlights
  • Accurate due date calculation
  • Weekly fetal development tracker
  • Customizable reminders and tracking
  • Health tips and resources
  • Tools for healthcare professionals
  • Symptom and feeling logging
Features
Read full description

Promotional Text for OB Wheel App "Introducing the OB Wheel App – Your Personalized Pregnancy Journey Companion! Navigating through pregnancy just got easier and more reliable with the OB Wheel App, specially designed for expectant mothers and healthcare professionals. Say goodbye to guesswork and hello to precision with our user-friendly app that offers accurate, at-a-glance pregnancy tracking. Key Features: Accurate Due Date Calculation: Simply enter your last menstrual period, and let our app do the rest. Get precise due dates and important milestones at your fingertips. Fetal Development Tracker: Watch your baby's growth week-by-week. Learn about developmental stages, size comparisons, and exciting changes as your pregnancy progresses. Customizable Experience: Every pregnancy is unique. Customize the app to suit your journey – set reminders, track appointments, and record your feelings and symptoms. Health Tips & Resources: Stay informed with valuable insights, nutritional advice, and tips for maintaining a healthy pregnancy from conception to delivery. Professional Tools for Clinicians: A handy resource for obstetricians and midwives, offering gestational age calculations, weight and length estimations, and more to support patient care. Why Choose OB Wheel App? Simplicity and Ease of Use: Designed with you in mind, our app is intuitive and straightforward, making pregnancy tracking stress-free. Trusted and Reliable: Developed in collaboration with healthcare professionals, ensuring accuracy and up-to-date information. Stay Connected: Share milestones with loved ones and keep your healthcare team in the loop with easy sharing options. Embrace the beauty of pregnancy and enjoy peace of mind with the OB Wheel App. Whether you're a first-time mom or a seasoned pro, our app will be by your side every step of the way. Download now and start your extraordinary journey to motherhood with confidence and joy! Privacy policy: https://odindevstudio.wordpress.com/privacy-policy Terms of use and Terms of Subscription https://odindevstudio.wordpress.com/terms

Screenshots

OB Calc (cloud)4 screens
OB Wheel4 screens

Verdict

The call

The clearest difference is rating: OB Calc (cloud) at 5.0 against OB Wheel's 4.3. OB Wheel's advantage is update cadence (every 4 days vs every 3 months) and monetization model (free vs free with in-app purchases). On price, ratings volume, ads and in-app purchases 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 OB Wheel sells 2 one-off in-app purchases. 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 4.3. Both are backed by a comparable volume of ratings — 5 and 10 respectively.

UpkeepUpdate frequency

OB Calc (cloud) ships an update every 3 months, OB Wheel every 4 days. The most recent releases landed on September 21, 2026 and September 3, 2026 respectively.

Scorecard4 real differences · 6 level
OB Calc (cloud) versus OB Wheel: the parameters behind the verdict, then further details
ParameterOB Calc (cloud)OB Wheel
PriceFreeFree
Rating5.0 (5 ratings) — better4.3 (10 ratings)
Positive reviews0.0% of reviews—
Number of ratings510 — better
Update frequencyEvery 3 monthsEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, Mac — betteriPhone, iPod
Requires iOS18.014.0 — better
Further details — not scored
Size14 MB28 MB
Age rating4+17+
DeveloperGlen BothaBerkay Gurcesme

Customer experience

OB Calc (cloud)

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

OB Wheel

All ratings10 ratings
Positive80.0%
Neutral10.0%
Negative10.0%

In-app purchases

2 purchases

OB Calc (cloud)

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

OB Wheel

One-time2
  • Ob Wheel lifetime ad-free$3.99
  • Unlimited Ad-free Ob wheel$9.99

Questions

Is OB Calc (cloud) free?
OB Calc (cloud) is free to download, with in-app purchases available.
Is OB Wheel free?
OB Wheel is free to download, with in-app purchases available.
Which has better reviews, OB Calc (cloud) or OB Wheel?
OB Calc (cloud) is rated higher. OB Calc (cloud) averages 5.0 out of 5 from 5 ratings, while OB Wheel averages 4.3 from 10 ratings.
Do OB Calc (cloud) or OB Wheel have ads?
Neither OB Calc (cloud) nor OB Wheel shows ads.
Which is updated more often, OB Calc (cloud) or OB Wheel?
OB Calc (cloud) ships an update every 3 months, and OB Wheel every 4 days. Most recently, OB Calc (cloud) was updated on September 21, 2026 and OB Wheel on September 3, 2026.

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