# OB Calc (cloud) — By a doctor, for doctors

> Obstetrician-designed tool for calculating patient test date windows. (iPhone/iPad app by Glen Botha.)

- Source: https://appshunter.io/ios/app/ob-calc-cloud/id1495610465 (this page in markdown: same URL + `.md`)
- Developer: [Glen Botha](https://appshunter.io/developer/943181947)
- Category: Medical
- Price: Free with in-app purchases
- Rating: 5.00/5 from 5 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 18.0 · 14 MB
- Languages: American English, French (France), German (Germany), European Portuguese, European Spanish
- Released: 2020-01-29
- Data updated: 2026-08-24
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/ob-calc-cloud/id1495610465/reviews.md

## What is OB Calc (cloud)?

While similar to a pregnancy wheel, OB Calc (cloud) is specifically designed by an obstetrician, for obstetricians.  Finally obstetricians have an efficient and simple method to calculate the important test date windows for patients.

     CALCULATION METHODS

•  Last Menstrual Period (LMP)
•  Expected Delivery Date (EDC)
•  Sonogram Date and Fetal Age (Sonogram)
•  Crown Rump Length (CRL)
•  In Vitro Fertilization (IVF)

Try the app for free for 7 days.  A low monthly autorenewable subscription gives users access to premium features such as all calculation methods and saving of individual patient data.  You can reach the developer directly at support@inpocketsolutions.com

   FEATURES
•  LMP, EDC, Ultrasound, CRL and IVF Method Calculations
•  Customize up to 15 tests, with date ranges
• Data synced across multiple devices
•  Generate a PDF file
•  Save individual patient data

CRL data reference : https://obgyn.onlinelibrary.wiley.com/doi/pdf/10.1002/uog.7654

Terms & Conditions: https://inpocketsolutions.com/terms

** Disclaimer 
Remember to test out the app on your specific device to ensure calculations are verified to your expectation.

## Key features

- LMP, EDC, Ultrasound, CRL, and IVF calculations
- Customizable test date ranges
- Cross-device data syncing
- PDF report generation
- Save individual patient data

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Monthly Subscription | $2.99 | per month |
| Premium (Annual) | $29.99 | per year |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/ob-calc-cloud/id1495610465/reviews.md

### 1/5 — 👎🏻

*2021-05-11*

App totalmente pago

## Frequently asked questions about OB Calc (cloud)

### What calculation methods does OB Calc offer?

OB Calc offers several calculation methods including Last Menstrual Period (LMP), Expected Delivery Date (EDC), Sonogram Date and Fetal Age (Sonogram), Crown Rump Length (CRL), and In Vitro Fertilization (IVF).

### How long is the free trial for OB Calc?

OB Calc offers a free trial period of 7 days for users to try the app before committing to a subscription.

### What are the subscription costs for OB Calc?

OB Calc offers a monthly subscription for $2.99 and an annual subscription for $29.99, providing access to premium features.

### Can I save patient data with OB Calc?

Yes, a key premium feature of OB Calc is the ability to save individual patient data, which is accessible with a subscription.

### Does OB Calc sync data across devices?

Yes, OB Calc features data syncing across multiple devices, ensuring your patient information is accessible wherever you are.

### Can I generate reports with OB Calc?

OB Calc allows users to generate a PDF file, which can be useful for sharing patient calculations and data.

### What devices is OB Calc compatible with?

OB Calc is available on Mac, iPhone, and iPad, making it accessible to a wide range of Apple users.

### How often is OB Calc updated?

The latest version of OB Calc is 2.10.0, and it was last updated on February 23, 2026. This indicates a commitment to ongoing development and improvements.

## Version history (last 5 releases)

### 2.10.1 — 2026-07-21

Support for the latest Liquid Glass features

### 2.10.0 — 2026-02-23

Support for the latest Liquid Glass features

### 2.9.4 — 2025-10-23

Support for the latest Liquid Glass features

### 2.9.3 — 2025-07-04

Improvements to the UI

### 2.9.2 — 2025-03-26

Improvements to the UI

## Apps similar to OB Calc (cloud)

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [TUA Member](https://appshunter.io/ios/app/tua-member/id1634143140) | — | Free | Medical |
| [牙荷-商家](https://appshunter.io/ios/app/id1637593140) | — | Free | Medical |
| [东莞健安医药](https://appshunter.io/ios/app/id1639081500) | — | Free | Medical |
| [ポケット埼歯](https://appshunter.io/ios/app/id1660164060) | — | Free | Medical |
| [Prescribing Companion App](https://appshunter.io/ios/app/prescribing-companion-app/id1643880020) | — | Free | Medical |
| [ihmsonline](https://appshunter.io/ios/app/ihmsonline/id1660390700) | — | Free | Medical |

## More apps by Glen Botha

- [OB Calc Pro](https://appshunter.io/ios/app/ob-calc-pro/id943181948)
- [Teacher Aide Pro](https://appshunter.io/ios/app/teacher-aide-pro/id1059855768)
- [Rubric Scorer](https://appshunter.io/ios/app/rubric-scorer/id1211395081)
- [Random Student - teachers](https://appshunter.io/ios/app/random-student-teachers/id1252785327)
- [Class Planner for teachers](https://appshunter.io/ios/app/class-planner-for-teachers/id1375048674)
- [Student Work](https://appshunter.io/ios/app/student-work/id1447577320)

All apps by Glen Botha: https://appshunter.io/developer/943181947

## Related topics

[obcalc](https://appshunter.io/ios/topics/obcalc) · [obscalc](https://appshunter.io/ios/topics/obscalc) · [obstetrics calculator](https://appshunter.io/ios/topics/obstetrics-calculator) · [calculadora obstetrica](https://appshunter.io/ios/topics/calculadora-obstetrica) · [lmp calculator](https://appshunter.io/ios/topics/lmp-calculator) · [the ob wheel pro 7](https://appshunter.io/ios/topics/the-ob-wheel-pro-7) · [embarazo rueda](https://appshunter.io/ios/topics/embarazo-rueda)

---

*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 2026-08-24.*