Simple, fast, yet more thorough than any other pregnancy wheel available for the iPhone, Perfect OB Wheel is better than just a replacement for your trusty paper wheel.

Here's why Perfect OB Wheel is your best choice of gestational calculator:

1) Input flexibility: Start with one of:
• Last menstrual period (LMP)
• Conception date
• Estimated date of confinement/delivery (EDC)
• Ultrasound dating: Number of weeks and days gestation as of a given date ("X Weeks").

2) Input speed: Other wheels for the iPhone make you conform to them for entering your patient's information. Why not be able to choose based on how you are holding the phone and what else you are doing at the same time?
• Use the numeric entry pad (0 3 3 0 2 0 0 8) and immediately see the results, OR
• Spin the date wheel at the bottom of the screen and tap Next.

3) Thorough results: All the information you would expect from a classic wheel, plus more:
• Estimated Due Date
• LMP Date
• Conception Date
• 1st Trimester End Date
• 2nd Trimester End Date
• Gestational Age
• Conceptional Age
• Expected Fetal Length based on standard fetal growth curves
• Expected Fetal Weight based on standard fetal growth curves ("How much does my baby weigh, doctor?")

Results are relative to 'today' by default; this can be quickly changed to reflect any date by tapping the 'today' button and selecting a new date.

4) Accurate results: Perfect OB Wheel provides exact dates and accounts for all calendar variance, including leap years.

5) Persistence: Perfect OB Wheel remembers the date and date type you last used and restores them when launched to streamline your workflow.

6) Perfect OB Tracker upgrade: Available as an in-app purchase update, the Perfect OB Tracker lets you track any number of pregnancies, with at-a-glance due date and gestational age and one-tap access to all the data Perfect OB Wheel provides. A picture and text notes can be kept on each patient. Postpartum tracking is also available. Passcode locking is available for HIPAA compliance.

What’s New

Version 46

• Fixed a bug when displaying the postpartum age.
•Fixed a crash on launch in the previous version affecting some users.

Ratings and Reviews

4.9 out of 5
132 Ratings
132 Ratings
Mausau ,

J'adore !

Excellente application avec de récentes améliorations. Petits bugs actuellement avec la fonction "delivered today". Ce qui serait super serait de pouvoir partager des patientes entre collègues.

Mimcgin ,

Just needs one more option.....

The app is quite good, and I no longer have to hunt for a wheel.

Only one thing is missing.

I need to be able to calculate the gestational age for a specific date, not just the day I'm using the app.

I'm sure the default could be the current date, with the option to change it...

I'm hoping for an update.....

Mnroy ,


Only preg calculator with option to enter ultrasound age and ultrasound date to get rest of dating info.


Evan Schoenberg, M.D.
17.3 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad and iPod touch.


English, Arabic, French, German, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish

Age Rating
You must be at least 17 years old to download this application.
Frequent/Intense Medical/Treatment Information
© 2008-2019 Regular Rate and Rhythm Software
In-App Purchases
  1. Perfect OB Tracker $6.99


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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