Comparison

Prego OB Wheel 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

Prego OB Wheel

This app is a simple obstetrical calculator and patient tracker. It helps healthcare professionals quickly determine pregnancy dates, gestational age, and track patient progress. Save patient information and notes for easy reference.

Highlights
  • Calculate pregnancy dates (LMP, ultrasound, conception, EDD)
  • Determine gestational age
  • Track pregnancies
  • Track postpartum patients
  • Save patient notes (Rh, GBS, GTPAL)
  • List upcoming deliveries
Features
Read full description

Quick, accurate, easy-to-use obstetrical date calculator and patient tracker designed and developed by family physician Dr. Émilie Coudière, MD. Calculate pregnancy dates from LMP, ultrasound, conception, or EDD. Determine gestational age as of any date. Track pregnancies and postpartum patients. QUICKLY CALCULATE • Pregnancy dates from LMP, ultrasound, conception, or EDD. • Patient's gestational age as of today. • Gestational age on future date — i.e. How many weeks will my patient be on June 15th? • Date of future gestational age — i.e. When will my patient be 28 weeks? QUICKLY SAVE • Patients' dates by simply adding a name. • Add quick notes to patients — i.e. Rh, GBS, GTPAL, etc. • Add delivery date to track postpartum patients. QUICKLY REFERENCE • Previously saved patients. • List of upcoming deliveries. • List of postpartum patients. That's it. One screen. Super simple. Enjoy! Enjoying Prego OB Wheel? Please leave a review! It means a lot to us and helps others discover the app. Thanks and take care! * Terms of use are available at https://jeffreyfulton.carrd.co

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

Prego OB Wheel4 screens
OB Calc (cloud)4 screens

Verdict

The call

Prego OB Wheel and OB Calc (cloud) both sit at 4.9 stars, but that hides the real split: 66% of Prego OB Wheel's written reviews are positive against 0% of OB Calc (cloud)'s. Prego OB Wheel also leads on in-app purchases (none vs 2) and ratings volume (325 vs 5). OB Calc (cloud)'s advantage is price (Free vs $4.99). On rating, update cadence, ads and device support 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

OB Calc (cloud) is free to download; Prego OB Wheel costs $4.99 up front. OB Calc (cloud) sells 2 in-app purchases, starting at $2.99 per month. Prego OB Wheel asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Prego OB Wheel against 5.0 for OB Calc (cloud). That said, the two scores are not equally well evidenced: Prego OB Wheel has 325 ratings behind it against 5, so its average is the more settled of the two. Written reviews are what separate them: 66% of Prego OB Wheel's written reviews are positive against 0% of OB Calc (cloud)'s.

UpkeepUpdate frequency

Prego OB Wheel ships an update every 2 months, OB Calc (cloud) every 3 months. Both last shipped on October 29, 2026.

Scorecard6 real differences · 4 level
Prego OB Wheel versus OB Calc (cloud): the parameters behind the verdict, then further details
ParameterPrego OB WheelOB Calc (cloud)
Price$4.99Free — better
Rating4.9 (325 ratings)5.0 (5 ratings) — better
Positive reviews65.5% of reviews — better0.0% of reviews
Number of ratings325 — better5
Update frequencyEvery 2 months — betterEvery 3 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS15.0 — better18.0
Further details — not scored
Size7 MB14 MB
Age rating4+4+
DeveloperJeffrey FultonGlen Botha

Customer experience

Prego OB Wheel

All ratings324 ratings
Positive97.8%
Neutral1.9%
Negative0.3%
Written reviews29 reviews
Positive65.5%
Neutral10.3%
Negative24.1%

OB Calc (cloud)

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

Bugs and requests

Prego OB Wheel

Reported bugs

8 issues
  • Lag in loading patients list
  • Text on screen doesn't appear properly
  • Last update ruined functionality
  • Cannot check simple EDD
  • No reset unless you save
Show 3 more
  • US date input for gestation is fiddly to undo
  • New version not in French
  • Gives false EDD

Requested features

7 requests
  • Search tab for patients
  • Separate tabs for antenatal and postnatal patients
  • Cloud function for syncing between devices
  • Option to calculate gestational age by ultrasound
  • Highlight today's date on date wheels
Show 2 more
  • Option for Spanish language
  • Handy, classy, and mistake-free update

OB Calc (cloud)

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Prego OB Wheel

No in-app purchases

2 purchases

OB Calc (cloud)

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

Questions

Is Prego OB Wheel free?
Prego OB Wheel costs $4.99, with no in-app purchases.
Is OB Calc (cloud) free?
OB Calc (cloud) is free to download, with in-app purchases available.
Which has better reviews, Prego OB Wheel or OB Calc (cloud)?
OB Calc (cloud) is rated higher. Prego OB Wheel averages 4.9 out of 5 from 325 ratings, while OB Calc (cloud) averages 5.0 from 5 ratings.
Do Prego OB Wheel or OB Calc (cloud) have ads?
Neither Prego OB Wheel nor OB Calc (cloud) shows ads.
Which is updated more often, Prego OB Wheel or OB Calc (cloud)?
Prego OB Wheel ships an update every 2 months, and OB Calc (cloud) every 3 months. Most recently, Prego OB Wheel was updated on October 29, 2026 and OB Calc (cloud) on October 29, 2026.

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