# Obstetrics Calculator

> Medical calculator for gestational age, due dates, and women's health risk assessments. (iPhone/iPad app by Alexander Snegirev.)

- Source: https://appshunter.io/ios/app/obstetrics-calculator/id1564764019 (this page in markdown: same URL + `.md`)
- Developer: [Alexander Snegirev](https://appshunter.io/developer/1564764021)
- Category: Medical, Reference
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings · 11 written reviews indexed
- Age rating: 12+
- Requires: iOS 13.0 · 90 MB
- Languages: American English, French (France), German (Germany), Italian, Russian, European Spanish
- Released: 2021-04-28
- Data updated: 2026-08-29
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/obstetrics-calculator/id1564764019/reviews.md

## What is Obstetrics Calculator?

Obstetric Calculator will help you determine gestational age in weeks and days as well as estimated due date using last menstrual period, ultrasound report, ovulation/IVF and other methods.

This set of tools ans scales contains:
- Estimated Due Date & Gestational Age by First Day of Last Menstrual Period
- Estimated Due Date & Gestational Age by Ultrasound Report
- Estimated Due Date & Gestational Age by Conception Date
- Estimated Due Date & Gestational Age by Quickening (= Fetal Movements)
- Estimated Due Date & Gestational Age from Given Date
- Timeframe for Maternity Leave
- Gestational Age & last menstrual period from Estimated Due Date
- Gestational Age by Crown-Rump Length
- Gestational Age by Fetal Biometry
- Estimated Fetal Weight by Mother's Biometry
- Bishop Score (Quick Cervix Assessment)
- Probability of Successful Vaginal Birth after Cesarean Section (or Trial of Labor)
- Breast Cancer Risk Estimation (Gail Model)
- Cervical Cancer Risk Estimation (ASCCP 2019 Guidelines)
- Ovarian Cancer Risk (O-RADS, ADNEX, ROMA)
- Follow-Up after Colposcopy/Treatment of CIN

Each tool is provided with instructions ("i" in the upper right corner).
This app was designed for educational use by health care providers in the field of Obstetrics & Gynecology.

## Key features

- Gestational age and due date calculation
- Multiple calculation methods (LMP, ultrasound, IVF)
- Maternity leave timeframe estimation
- Bishop Score and TOLAC probability
- Cancer risk estimations (Breast, Cervical, Ovarian)
- Follow-up after colposcopy

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| ObCalc Pro | $1.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Disable Ads | $10.99 | one-time |


## Recent user reviews (10 of 11)

All indexed reviews: https://appshunter.io/ios/app/obstetrics-calculator/id1564764019/reviews.md

### 3/5 — Не работает раздел «лекарства при беременности»

*2026-04-24*

В целом, приложено удобное, часто им пользуюсь. Но не работает раздел «лекарства при беременности», а я ради него только купила подписку. Прошу разобраться в этой ситуации и наладить нормальное функционирование вашего приложения.

### 5/5 — Подписка

*2026-01-22*

Очень нравится приложение. Но подскажите, как оформить подписку в России - можно ли как-то иначе провести оплату?

### 3/5 — Не работает поиск лекарств

*2025-10-11*

Оплатила подписку, но в поиске лекарств белая страница, препараты не ищутся

### 3/5 — Не работает поиск лекарств

*2025-09-03*

Оформила подписку, но поиск лекарственных препаратов ничего не показывает-белая страница

### 4/5 — Предложение

*2025-05-20*

Мне приложение нравится своим удобством! Но не хватает калькулятор ПДР по последней менструации и УЗИ

### 5/5 — Супер

*2025-03-03*

Незаменимый помощник в род доме! Облегчает подсчеты и экономит время. Спасибо разработчикам.

### 1/5 — Не открывается приложение

*2023-09-23*

Почему приложение не открывается?

### 4/5 — Недочёт

*2022-09-04*

Есть техническая проблема. При вводе данных при подсчете риска рака шейки матки в истории обследований нет возможности выбрать, что год назад был ВПЧ положительный, только отрицательный даёт

**Developer response:** Спасибо за отзыв. Добавил в последнем обновлении

### 4/5 — Недочет

*2022-07-19*

При расчётах риска рака шейки матки при выборе графы «результаты предыдущего скрининга» не даёт на выбор положительные результаты ВПЧ и ПАП, только отрицательные, либо отсутсвие предыдущего скрининга 🤷🏻‍♀️

**Developer response:** Спасибо, что сообщили. Добавлю в следующем обновлении

### 3/5 — Как им пользоваться?

*2021-10-03*

Непонимаю, как им пользоваться. Вносишь все показатели и ничего не происходит, расчета нет.

**Developer response:** Пришлите, пожалуйста, скриншот с проблемными расчетами на почту inbox@alefrei.com
В большинстве случаев все расчитывается автоматически после заполнения форм

## Frequently asked questions about Obstetrics Calculator

### How does Obstetrics Calculator determine gestational age?

Obstetrics Calculator offers multiple methods to determine gestational age, including using the first day of the last menstrual period, ultrasound reports, conception date, or fetal movements (quickening).

### What types of risk assessments are available in Obstetrics Calculator?

The app includes risk estimations for Breast Cancer (Gail Model), Cervical Cancer (ASCCP 2019 Guidelines), and Ovarian Cancer (O-RADS, ADNEX, ROMA). It also provides the probability of successful vaginal birth after Cesarean section.

### Is Obstetrics Calculator suitable for all users?

Obstetrics Calculator is designed for educational use by healthcare providers in Obstetrics & Gynecology. It has an age rating of 12+.

### What devices does Obstetrics Calculator support?

Obstetrics Calculator is available on iPhone, iPad, and iPod devices.

### How often is Obstetrics Calculator updated?

The app was last updated on January 25, 2025, indicating regular maintenance and updates.

### Does Obstetrics Calculator have ads?

Yes, Obstetrics Calculator contains advertisements.

### What is the ObCalc Pro subscription?

ObCalc Pro is a subscription plan for Obstetrics Calculator priced at $1.99 per month, likely offering enhanced features or an ad-free experience.

### Can Obstetrics Calculator help with maternity leave planning?

Yes, Obstetrics Calculator includes a tool to determine the timeframe for maternity leave based on gestational age and estimated due date.

## Version history (last 5 releases)

### 5.2 — 2025-01-25

- minor bug fixes

### 5.1 — 2024-06-16

Minor bug fixes.

### 5.0 — 2023-10-03

- Startup crash fixed.

### 4.9 — 2023-06-06

Minor internal fixes.

### 4.8 — 2023-05-03

Minor performance fixes.

## Apps similar to Obstetrics Calculator

| App | Rating | Price | Category |
| --- | --- | --- | --- |
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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 2026-08-29.*