# OB Calc Pro — Pregnancy Wheel for doctors > Obstetric calculator for determining patient test dates and fetal age. (iPhone/iPad app by Glen Botha.) - Source: https://appshunter.io/ios/app/ob-calc-pro/id943181948 (this page in markdown: same URL + `.md`) - Developer: [Glen Botha](https://appshunter.io/developer/943181947) - Category: Medical, Reference - Price: $99.99 - Rating: 5.00/5 from 2 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 15.0 · 1 MB - Languages: English, French, German, Portuguese, Spanish - Released: 2014-12-02 - Data updated: 2026-06-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/ob-calc-pro/id943181948/reviews.md ## What is OB Calc Pro? Obstetricians, are you tired of calculating important patient dates using a calendar or spreadsheet? While similar to a pregnancy wheel, OB Calc Pro 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. (Appreciation to Dr. Rosanne Botha, an amazing OB/GYN, for the inspiration behind this app.) CALCULATION METHODS • Last Menstrual Period (LMP) • Expected Delivery Date (EDC) • Sonogram Date and Fetal Age (Sonogram) • Crown Rump Length (CRL) FEATURES 8 common test dates are set up by default. However, these test names and date windows can be completely customized in the Settings screen so you can set up your own items if you prefer. OB Calc Pro supports up to 10 test dates. If you like this app, please consider leaving rating comments as well as emailing me directly with feedback. You can reach the developer directly at support@inpocketsolutions.com ** Disclaimer Remember to test out the app on your specific device to ensure calculations are verified to your expectation. ## Key features - Calculate test date windows - Customizable test dates and windows - Supports up to 10 test dates - Calculation by LMP, EDC, Sonogram, CRL - Designed for obstetricians ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/ob-calc-pro/id943181948/reviews.md ### 5/5 — Can't work without it *2017-10-18* Usually it's spot on so if I forget my phone at home and don't have it to wheel out my patients I feel totally lost. This is an especially great tool for those of us who need reading glasses to see those tiny wheels. Highly recommend it and have had several of my coworkers download it for the same reason **Developer response:** So glad to hear you find the app useful. Thanks for spreading the word to your coworkers. ### 5/5 — Great app for calculating NT & FIS testing date ranges *2015-11-10* Great straightforward app and at a great price. Responsive developer. Let's me calculate all the testing date ranges for the first and second trimester prenatal aneuploidy screening tests. ## Frequently asked questions about OB Calc Pro ### What is OB Calc Pro used for? OB Calc Pro is a specialized medical calculator designed for obstetricians to efficiently determine important patient dates, including test date windows and fetal age. It simplifies calculations that would otherwise require manual methods like calendars or spreadsheets. ### How does OB Calc Pro calculate dates? OB Calc Pro supports multiple calculation methods, including Last Menstrual Period (LMP), Expected Delivery Date (EDC), Sonogram Date and Fetal Age, and Crown Rump Length (CRL). This allows for flexibility based on available patient information. ### Can I customize the test dates in OB Calc Pro? Yes, OB Calc Pro allows for complete customization of test names and date windows. You can set up to 10 custom test dates in the Settings screen to match your specific practice needs. ### What devices does OB Calc Pro support? OB Calc Pro is available for iPhone, iPad, and iPod. It is designed to run on Apple's mobile operating system. ### How much does OB Calc Pro cost? OB Calc Pro is a paid application, priced at $99.99. This one-time purchase provides access to all its features for obstetric calculations. ### When was OB Calc Pro last updated? The latest version of OB Calc Pro, 1.6.5, was last updated on February 22, 2025. This indicates ongoing support and potential for future improvements. ### What is the age rating for OB Calc Pro? OB Calc Pro has an age rating of 4+, meaning it is suitable for users of all ages. The app's content is not considered mature or inappropriate for younger audiences. ### Does OB Calc Pro have ads? No, OB Calc Pro does not contain advertisements. As a paid application, it provides an ad-free experience for users. ## Version history (last 5 releases) ### 1.6.5 — 2025-02-22 Updated the date picker for the latest software versions ### 1.06.04 — 2020-01-31 Link to the new version of the app which premium features are available to current users for 2020. ### 1.06.03 — 2020-01-30 Link to the new version of the app which premium features are available to current users for 2020. ### 1.06.02 — 2019-10-19 Support for the date picker when using the iPad floating keyboard ### 1.06.01 — 2019-09-24 • Support for devices running iOS 13. ## More apps by Glen Botha - [Teacher Aide Pro](https://appshunter.io/ios/app/teacher-aide-pro/id1059855768) - [Rubric Scorer](https://appshunter.io/ios/app/rubric-scorer/id1211395081) - [Random Student - teachers](https://appshunter.io/ios/app/random-student-teachers/id1252785327) - [Class Planner for teachers](https://appshunter.io/ios/app/class-planner-for-teachers/id1375048674) - [Student Work](https://appshunter.io/ios/app/student-work/id1447577320) All apps by Glen Botha: https://appshunter.io/developer/943181947 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*