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 medical app offers precise pregnancy calculations for healthcare professionals and expectant parents. It features multiple calculation modes, projected gestational age, and a timeline of key clinical milestones and screenings. Users can also filter milestones by trimester and compare fetal growth with relatable size comparisons.

Highlights
  • Multiple calculation modes (LMP, EDD, IVF, GA)
  • Projected gestational age calculation
  • Clinical milestone timeline
  • Trimester filtering
  • Fetal size comparisons
Features
Read full description

Designed by Andrew Yu, MD, A double board certified OB/GYN and Clinical Informatics. OB Wheel+ is a streamlined and reliable tool for calculating essential pregnancy dates. Whether you are a clinician in a fast-paced environment or an expectant parent tracking milestones, this app provides the accuracy you need with an intuitive, modern interface. Key Features: • Multiple Calculation Modes: Calculate based on Last Menstrual Period (LMP), Known Due Date (EDD), IVF Transfer Date (Day 3 or Day 5), or Gestational Age (GA) from a specific scan date. • Projected GA: Easily determine what the gestational age will be on any future date. • Clinical Milestones: Automatically generates a comprehensive timeline for essential screenings, including NIPT, Anatomy Scan, Glucose testing, and vaccinations including RSV during the appropriate season. • Trimester Filtering: Focus on the milestones that matter right now with easy T1, T2, and T3 filters. • Fetal Size Comparisons: Track baby’s growth with relatable size comparisons. Medical Disclaimer: This app is intended for informational and educational purposes only. It does not constitute medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read in this application.

Screenshots

OB Calc (cloud)4 screens
OB Wheel+4 screens

Verdict

The call

The clearest difference is in-app purchases: OB Wheel+ at none against OB Calc (cloud)'s 2. OB Calc (cloud)'s advantage is ads (none vs shown) and ratings volume (5 vs 1). On price, rating and iOS requirement 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. 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 — 5.0 for OB Calc (cloud) against 5.0 for OB Wheel+. 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.

Scorecard5 real differences · 5 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)5.0 (1 ratings)
Positive reviews0.0% of reviews—
Number of ratings5 — better1
Update frequencyEvery 3 months—
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPad, Mac — betteriPhone
Requires iOS18.017.6 — better
Further details — not scored
Size14 MB11 MB
Age rating4+17+
DeveloperGlen BothaAndrew Yu

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 ratings1 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
None

OB Wheel+

No in-app purchases

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 no in-app purchases.
Which has better reviews, OB Calc (cloud) or OB Wheel+?
OB Calc (cloud) and OB Wheel+ are both rated 5.0 out of 5 on the App Store, from 5 and 1 ratings respectively.
Do OB Calc (cloud) or OB Wheel+ have ads?
OB Wheel+ shows ads; OB Calc (cloud) does not.

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