Quick, accurate, easy-to-use obstetrical date calculator designed and developed by family physician Dr. Émilie Coudière. 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!

* Terms of use are available at

What’s New

Version 2.3

Just a few under-the-hood improvements to keep things running smoothly on iOS 14.

Enjoying OB Wheel? Please leave a review! It means a lot to us and helps others discover the app. Thanks and take care!

Ratings and Reviews

4.9 out of 5
226 Ratings

226 Ratings

Pastamus ,

Best app I have used in a long time!

Beautiful interface, simple and easy to use (only one page with three date wheels), and displays information quickly. No bugs I personally found. One possible improvement is highlighting the date when it’s today’s date so that it’s easier to tell when today’s date is selected. Thank you for making this app!

Developer Response ,

Thank you for suggesting we highlight the gestational age date when it’s set to today. It was a little tricky to get right but I think we have something good in the latest 1.2.1 update. Check it out and let us know what you think!

Randy2017 ,


O My Gosh an app that is free and that works beautifully! I love the different colors for FDLMP, GESTATION, and DUE DATE.

App Privacy

The developer, Jeffrey Fulton, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

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

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