This is the second version of the OB Calc Pro app, and it has some new features.

While similar to a pregnancy wheel, OB Calc 2 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.


• Last Menstrual Period (LMP)
• Expected Delivery Date (EDC)
• Ultrasound Date and Fetal Age (ULS)
• Crown Rump Length (CRL)
• In Vitro Fertilization (IVF)

The free version of the app has access to the LMP Method for a demo patient. A low monthly autorenewable subscription gives users access to premium features such as all calculation methods and saving of individual patient data. A free 1 week trial is available so the app can be tested easily. You can reach the developer directly at

• Customize up to 10 tests, with date ranges
• LMP Method Calculation
• Generate a PDF file with watermark

• Save individual patient data
• Use 5 different calculation methods
• Customize up to 10 tests, with date ranges
• Generate a PDF file without watermark (coming soon)

CRL data reference :

Terms & Conditions:

** Disclaimer
Remember to test out the app on your specific device to ensure calculations are verified to your expectation.

What’s New

Version 2.6.1

Improvements to the user interface

Ratings and Reviews

5.0 out of 5
2 Ratings

2 Ratings

App Privacy

The developer, Glen Botha, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Purchases

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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