# OB Calc (cloud) vs Docguia

The clearest difference is in-app purchases: Docguia at none against OB Calc (cloud)'s 2. Docguia also leads on update cadence (weekly vs every 3 months) and iOS requirement (16.4 vs 18.0). OB Calc (cloud)'s advantage is device support (3 vs 1). On price and ads there is nothing between them.

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

OB Calc (cloud) ships an update every 3 months, Docguia weekly. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | OB Calc (cloud) | Docguia |
| --- | --- | --- |
| 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 | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 14 MB | 77 MB |
| Requires iOS | 18.0 | **16.4** |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Glen Botha](https://appshunter.io/developer/943181947) | [Docguia LLC](https://appshunter.io/developer/6782212591) |

## 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 |


### Docguia

[App page](https://appshunter.io/ios/app/docguia/id6782212589)

**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 Docguia free?

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

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

Neither OB Calc (cloud) nor Docguia shows ads.

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

OB Calc (cloud) ships an update every 3 months, and Docguia weekly. Most recently, OB Calc (cloud) was updated on October 27, 2026 and Docguia on October 25, 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.*