# OB Calc (cloud) vs EDD

The clearest difference is review sentiment: EDD at 100% against OB Calc (cloud)'s 0%. EDD also leads on in-app purchases (none vs 2) and update cadence (every 2 weeks vs every 3 months). OB Calc (cloud)'s advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. OB Calc (cloud) sells 2 in-app purchases, starting at $2.99 per month. EDD asks for nothing beyond the download.

OB Calc (cloud) ships an update every 3 months, EDD every 2 weeks. The most recent releases landed on November 11, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | OB Calc (cloud) | EDD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/ob-calc-cloud/id1495610465/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 14 MB | 4 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Glen Botha](https://appshunter.io/developer/943181947) | [Kunlepaints Ltd](https://appshunter.io/developer/1678007873) |

## What reviewers say

### OB Calc (cloud)

[App page](https://appshunter.io/ios/app/ob-calc-cloud/id1495610465)

This medical app helps obstetricians efficiently calculate key patient test date windows. It offers multiple calculation methods and allows for saving patient data and generating PDF reports. A free trial is available, followed by a subscription for full access.

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

**Features:** Vision Pro support

**In-app purchases (2)**

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


### EDD

[App page](https://appshunter.io/ios/app/edd-ega-calculator/id6446463842)

This medical app helps calculate Estimated Due Date (EDD) and Estimated Gestational Age (EGA). It offers two methods for calculation: using the Last Menstrual Period (LMP) or a provided EDD from Ultrasound (USS). The interface is designed for simplicity and speed.

**Highlights:** Calculate EDD using LMP, Calculate EDD using USS, Calculate EGA, Simple interface, Fast calculations

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is OB Calc (cloud) free?

OB Calc (cloud) is free to download, with in-app purchases available.

### Is EDD free?

EDD is free to download, with no in-app purchases.

### Do OB Calc (cloud) or EDD have ads?

EDD shows ads; OB Calc (cloud) does not.

### Which is updated more often, OB Calc (cloud) or EDD?

OB Calc (cloud) ships an update every 3 months, and EDD every 2 weeks. Most recently, OB Calc (cloud) was updated on November 11, 2026 and EDD on November 12, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*