# PTH Calculator vs Concise OB/GYN Handbook

The clearest difference is in-app purchases: PTH Calculator at none against Concise OB/GYN Handbook's 4. PTH Calculator also leads on device support (4 vs 2) and iOS requirement (11.0 vs 16.0). On price and ads there is nothing between them.

Both are free to download. Concise OB/GYN Handbook sells 4 in-app purchases, starting at $2.99 per month. PTH Calculator asks for nothing beyond the download.

## The numbers

| Metric | PTH Calculator | Concise OB/GYN Handbook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 37 months | — |
| Size | 25 MB | 47 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [AVANTO CREATIVE APPS S.L.](https://appshunter.io/developer/1080379340) | [RER MedApps](https://appshunter.io/developer/1720150558) |

## What reviewers say

### PTH Calculator

[App page](https://appshunter.io/ios/app/pth-calculator/id1137356636)

**In-app purchases:** none


### Concise OB/GYN Handbook

[App page](https://appshunter.io/ios/app/concise-obgyn-handbook/id6738857076)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $2.99 | per month |
| Premium Yearly | $24.99 | per year |
| Lifetime Access - 50% Off | $24.99 | one-time |
| Lifetime Access | $49.99 | one-time |


## Frequently asked questions

### Is PTH Calculator free?

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

### Is Concise OB/GYN Handbook free?

Concise OB/GYN Handbook is free to download, with in-app purchases available.

### Do PTH Calculator or Concise OB/GYN Handbook have ads?

Neither PTH Calculator nor Concise OB/GYN Handbook shows ads.

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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.*