# Obstetric Tools: OB Calculator — Pregnancy wheel & newborn care

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

- Source: https://appshunter.io/ios/app/obstetric-tools-ob-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
- Rating: 4.75/5 from 4 App Store ratings
- Age rating: 17+
- Requires: iOS 15.1 · 69 MB
- Languages: Australian English, Arabic, Dutch, French (France), German (Germany), Hindi, Italian, Japanese, Korean, European Portuguese and 5 more
- Released: 2025-03-07
- Data updated: 2026-10-25
- Monetization: free with in-app purchases

## What is Obstetric Tools?

Keep obstetric and neonatal reference tools together, from pregnancy dating to newborn assessment. Obstetric Tools is designed for midwives, obstetricians and other healthcare professionals.

PREGNANCY AND MATERNAL CARE
Use the pregnancy wheel to calculate gestational age and estimated due date. Explore IVF dating, estimated fetal weight with Hadlock IV, BMI and pregnancy weight gain, serial beta-hCG change, amniotic fluid assessment, twin weight discordance, mean arterial pressure and blood loss calculations.

NEWBORN CARE AND CLINICAL SCALES
Find Apgar, Bishop, Silverman-Andersen, Edinburgh, PUQE-24, LATCH and other reference scales. Calculate corrected age and newborn weight change. Search the tool catalog and open explanations, reference tables and sources from each tool.

FREE TOOLS AND OPTIONAL PRO
Use the available free tools or choose an individual monthly or annual auto-renewing Pro subscription for all Pro tools and an ad-free experience. The store shows the price and billing period before purchase. Manage or cancel renewal in your store settings. No app account is required.

PRIVACY AND CLINICAL USE
Clinical calculations run on your device. Technical usage, purchase and diagnostic data are described in the privacy policy; clinical inputs are not included in analytics events.

For professional information and education. This app is not a medical device and does not diagnose, prescribe or replace clinical judgement. Check results against the clinical context, original references and your local protocols.

Privacy: https://milkynest.com/privacy/
EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## 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 |
| --- | --- | --- |
| Obstetric Tools Pro Monthly | $3.99 | per month |
| Obstetric Tools Pro Annual | $24.99 | per year |
| Premium Monthly | $1.99 | per month |
| Premium Annual | $4.99 | per year |


## Is Obstetric Tools safe?

Not enough ratings yet to assess Obstetric Tools.

## Is Obstetric Tools legit?

Obstetric Tools: OB Calculator appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Obstetric Tools is 73 out of 100 points across 7 verification signals from App Store and developer data.


## Frequently asked questions about Obstetric Tools

### 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)

### 3.0.0 — 2026-10-22

3.0 brings more obstetric and neonatal tools, clearer explanations and tables, a redesigned introduction and Pro screen, and improvements for phones and tablets.

### 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

## Apps similar to Obstetric Tools

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [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 |
| [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) | 4.7 (50) | Free | Medical |
| [OB Wheel](https://appshunter.io/ios/app/ob-wheel/id6473123188) | 4.3 (10) | Free | Medical |
| [MSD Manual Guide to Obstetrics](https://appshunter.io/ios/app/msd-manual-guide-to-obstetrics/id1485620300) | 4.0 (4) | 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

## Related topics

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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 2026-10-25.*