# GestAge vs OB Calc (cloud)

The clearest difference is review sentiment: GestAge at 81% against OB Calc (cloud)'s 0%. GestAge also leads on iOS requirement (13.0 vs 18.0). OB Calc (cloud)'s advantage is rating (5.0 vs 2.0) and ads (none vs shown). On price, ratings volume, update cadence and in-app purchases there is nothing between them.

Both are free to download. GestAge sells 2 one-off in-app purchases and OB Calc (cloud) sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

OB Calc (cloud) holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 3 and 5 respectively. Written reviews complicate that: 81% of GestAge's written reviews are positive against 0% of OB Calc (cloud)'s, so the app with the better star average is not the one people write more warmly about.

Both ship on a similar rhythm, roughly every 3 months. Both last shipped on September 21, 2026.

## The numbers

| Metric | GestAge | OB Calc (cloud) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (3 ratings)](https://appshunter.io/ios/app/gestage/id430169277/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/ob-calc-cloud/id1495610465/reviews)** |
| Number of ratings | 3 | **5** |
| Positive reviews | **81.5% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 23 MB | 14 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 17+ | 4+ |
| Developer | [J. Verchere](https://appshunter.io/developer/430169280) | [Glen Botha](https://appshunter.io/developer/943181947) |

## What reviewers say

### GestAge

[App page](https://appshunter.io/ios/app/gestage/id430169277)

This medical app assists healthcare professionals and pregnant individuals in accurately calculating due dates and gestational age. It provides essential tools for managing pregnancy timelines.

**Highlights:** Calculate due date, Calculate gestational age, Pregnancy timeline management, Tools for healthcare professionals, Tools for pregnant women

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ultrasound scan tools | $0.99 | one-time |
| Just get rid of the ads ! | $9.99 | one-time |


### 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 |


## Frequently asked questions

### Is GestAge free?

GestAge is free to download, with in-app purchases available.

### Is OB Calc (cloud) free?

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

### Which has better reviews, GestAge or OB Calc (cloud)?

OB Calc (cloud) is rated higher. GestAge averages 2.0 out of 5 from 3 ratings, while OB Calc (cloud) averages 5.0 from 5 ratings.

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

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

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

GestAge ships an update every 3 months, and OB Calc (cloud) every 3 months. Most recently, GestAge was updated on September 21, 2026 and OB Calc (cloud) on September 21, 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.*