# OB Wheel & EDD Calculator — For OBGYN, Midwife & Doctor

> Clinical pregnancy wheel and calculator for obstetricians and midwives. (iPhone/iPad app by Pedro Iniesta.)

- Source: https://appshunter.io/ios/app/ob-wheel-and-edd-calculator/id6742823689 (this page in markdown: same URL + `.md`)
- Developer: [Pedro Iniesta](https://appshunter.io/developer/1645524353)
- Category: Medical, Health & Fitness
- Price: Free with in-app purchases (on sale, was $2.99)
- Rating: 4.70/5 from 3 App Store ratings
- Age rating: 17+
- Requires: iOS 15.1 · 62 MB
- Languages: American English, Arabic, Dutch, French (France), German (Germany), Hindi, Italian, Japanese, Korean, Brazilian Portuguese and 5 more
- Released: 2025-03-07
- Data updated: 2026-08-30
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/ob-wheel-and-edd-calculator/id6742823689/reviews.md

## What is OB Wheel & EDD Calculator?

The Ultimate Clinical Toolkit for Obstetricians and Midwives.

Designed specifically for healthcare professionals, Obstetric Tools is the most precise, fast, and comprehensive pregnancy wheel and clinical calculator available. Whether you are in a busy outpatient clinic or an offline delivery room, get evidence-based results in seconds to optimize your patient care.

Built by and for medical professionals, our app replaces traditional cardboard wheels and scattered reference books with a single, highly optimized digital suite.

CORE FEATURES

Advanced Gestogram (Pregnancy Wheel)

Calculate Estimated Due Date (EDD), Gestational Age (GA), and Conception Date instantly.

Flexible Dating: Calculate based on Last Menstrual Period (LMP) or reverse-calculate by entering the current Gestational Age from an ultrasound.

Highly precise chronologies to track pregnancy milestones effortlessly.

Clinical Calculators

Estimated Fetal Weight (EFW): Highly accurate calculations based on the global Hadlock IV formula (BPD, HC, AC, FL).

Maternal BMI & Weight Gain: Calculate pre-pregnancy BMI and track recommended weight gain per trimester.

Fischer Score: Objective evaluation of cardiotocographic (CTG) records.

MgSO4 Dosing: Quick and safe calculation for magnesium sulfate infusion in preeclampsia management.

Essential Medical Tests & Scales

Bishop Score: Assess cervical ripeness and the probability of successful labor induction.

Apgar Score: Standardized newborn assessment at 1, 5, and 10 minutes.

Silverman-Andersen Score: Evaluate neonatal respiratory distress.

Kramer's Rule: Visual assessment of neonatal jaundice.

Edinburgh Scale: Postnatal depression screening tool.

WHY CHOOSE OBSTETRIC TOOLS?

100% Offline Functionality: We know hospitals have dead zones. Our app works flawlessly in delivery rooms, bunkers, and areas with zero network coverage.

Evidence-Based: Every calculator and scale includes a dedicated "Clinical Info" section detailing the medical formulas, parameters, and scientific backing used.

Zero-Data Privacy Policy: We respect patient confidentiality. The app acts as a blind calculator. No patient health data is ever collected, saved, or transmitted.

About Obstetric Tools Premium
While the core app is free to use, Obstetric Tools offers auto-renewing subscriptions to unlock all advanced premium features (like EFW, Bishop, Apgar) and provide a completely ad-free clinical experience.

Payment will be charged to your iTunes Account at confirmation of purchase.

Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period.

Your account will be charged for renewal within 24-hours prior to the end of the current period.

You can manage your subscriptions and turn off auto-renewal by going to your Account Settings after purchase.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://milkynest.com/privacy

## Key features

- Advanced Gestogram (Pregnancy Wheel)
- Estimated Due Date (EDD) & Gestational Age (GA) calculation
- Estimated Fetal Weight (EFW) calculator
- Maternal BMI & Weight Gain tracker
- Bishop Score, Apgar Score, and other clinical scales
- 100% Offline Functionality
- Evidence-based clinical information

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Premium Monthly | $1.99 | per month |
| Premium Annual | $4.99 | per year |



## Frequently asked questions about OB Wheel & EDD Calculator

### What is the OB Wheel & EDD Calculator?

The OB Wheel & EDD Calculator is a clinical toolkit designed for obstetricians and midwives. It offers a precise pregnancy wheel and various clinical calculators to aid in patient care, functioning even without an internet connection.

### Does OB Wheel & EDD Calculator have ads?

Yes, OB Wheel & EDD Calculator contains advertisements. Users can opt for a premium subscription to unlock advanced features and remove advertisements for a completely ad-free clinical experience.

### What are the premium subscription options for OB Wheel & EDD Calculator?

OB Wheel & EDD Calculator offers auto-renewing subscriptions. Options include Premium Monthly for $1.99/month and Premium Annual for $4.99/year, both with a 7-day free trial. Subscriptions can be managed in your Account Settings.

### How does OB Wheel & EDD Calculator handle patient data privacy?

OB Wheel & EDD Calculator has a zero-data privacy policy, meaning no patient health data is collected, saved, or transmitted. The app functions as a blind calculator to respect patient confidentiality.

### What clinical calculators are included in OB Wheel & EDD Calculator?

The app includes calculators for Estimated Fetal Weight (EFW) using the Hadlock IV formula, Maternal BMI & Weight Gain, Fischer Score, and MgSO4 Dosing for preeclampsia management.

### What medical tests and scales are available in OB Wheel & EDD Calculator?

It features the Bishop Score for cervical ripeness, Apgar Score for newborn assessment, Silverman-Andersen Score for neonatal respiratory distress, Kramer's Rule for jaundice, and the Edinburgh Scale for postnatal depression screening.

### Is OB Wheel & EDD Calculator available on all devices?

OB Wheel & EDD Calculator is available for iPhone, iPad, and iPod. It is designed for iOS devices and is rated for users aged 17 and older.

### How often is OB Wheel & EDD Calculator updated?

The latest version of OB Wheel & EDD Calculator is 2.0.2, last updated on April 7, 2026. This indicates a recent update, suggesting ongoing development and support for the application.

## Version history (last 5 releases)

### 2.0.2 — 2026-04-07

We regularly update our OB wheel to ensure the highest accuracy. This version includes performance optimizations for lightning-fast EDD & LMP calculations, UI improvements for patient consultations, and minor bug fixes for reliable daily obstetric practice.

### 2.0.1 — 2026-03-27

This update focuses on performance and reliability to provide a smoother experience for healthcare professionals:

Massive performance optimization: The Gestogram and date calculators now open instantly, even on older devices.

Improved stability: Fixed several critical crashes and errors.

Smoother navigation: Rebuilt the date selection wheels to be faster and more responsive.

Infrastructure upgrade: Integrated Firebase services for better error reporting and app stability.

UI Polish: Refined layout and interaction logic for professional excellence.
Thank you for using Obstetric Tools. We continue working to provide the most reliable toolkit for your daily practice.

### 2.0.0 — 2026-03-19

We are proud to present a total transformation of Obstetric Tools. This update is not just a visual facelift, but a complete technical overhaul designed to provide the best clinical experience for healthcare professionals.

Key Improvements:

Brand New Interface: A completely redesigned user experience that is cleaner, faster, and more intuitive. Access any tool in fewer taps.

Enhanced Clinical Toolkit: We have optimized all our calculators, including the Gestogram, EFW (Estimated Fetal Weight), Bishop Score, Apgar, and more, ensuring maximum precision and reliability.

Improved Performance: Significant internal optimizations for near-instant loading times and smoother transitions between tools.

New Multi-language Support: Obstetric Tools is now truly global. We have added professional translations for over 25 languages, including German, Arabic, Catalan, Hindi, Japanese, and many more.

Advanced Clinical Info: Expanded documentation and clinical references for every scale and calculator, providing professional support for every result.

Bug Fixes & Stability: We have addressed reported issues to ensure the most stable and reliable version to date.

Thank you for trusting Obstetric Tools to support your daily clinical practice!

### 1.2.0 — 2025-06-08

Improvements added and link to our blog

### 1.1.2 — 2025-04-21

More details implemented

## Apps similar to OB Wheel & EDD Calculator

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Obstetrics Calculator](https://appshunter.io/ios/app/obstetrics-calculator/id1564764019) | 5.0 (1) | Free | Medical |
| [OB Tracker & Pregnancy Wheel](https://appshunter.io/ios/app/ob-tracker-and-pregnancy-wheel/id1454135001) | 4.8 (47) | Free | Medical |
| [MSD Manual Guide to Obstetrics](https://appshunter.io/ios/app/msd-manual-guide-to-obstetrics/id1485620300) | 4.0 (4) | Free | Medical |
| [Obstetric Calculator Plus](https://appshunter.io/ios/app/obstetric-calculator-plus/id1606532563) | 4.7 (6) | Free | Medical |
| [OB Calc (cloud)](https://appshunter.io/ios/app/ob-calc-cloud/id1495610465) | 5.0 (5) | Free | Medical |
| [Obstetrical Calculator](https://appshunter.io/ios/app/obstetrical-calculator/id590285512) | — | Free | Medical |

## More apps by Pedro Iniesta

- [MeloDay Music](https://appshunter.io/ios/app/meloday-music/id6738792245)
- [Word Search Solver With Photo](https://appshunter.io/ios/app/word-search-solver-with-photo/id6741116396)
- [Create Word Search](https://appshunter.io/ios/app/create-word-search/id6741488663)
- [Sudoku Solver With Photo](https://appshunter.io/ios/app/sudoku-solver-with-photo/id6751745124)
- [Zeroki: Math Puzzle Game](https://appshunter.io/ios/app/zeroki-math-puzzle-game/id6763060920)

All apps by Pedro Iniesta: https://appshunter.io/developer/1645524353

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*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 2026-08-30.*