# Concise OB/GYN Handbook vs Co

The clearest difference is in-app purchases: Co at none against Concise OB/GYN Handbook's 4. Concise OB/GYN Handbook's advantage is iOS requirement (16.0 vs 18.0). On price, ads and device support 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. Co asks for nothing beyond the download.

## The numbers

| Metric | Concise OB/GYN Handbook | Co |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Every 3 months |
| Size | 47 MB | 30 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [RER MedApps](https://appshunter.io/developer/1720150558) | [Allogy Interactive](https://appshunter.io/developer/357433598) |

## What reviewers say

### 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 |


### Co

[App page](https://appshunter.io/ios/app/co-responder/id6756629882)

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

**In-app purchases:** none


## Frequently asked questions

### Is Concise OB/GYN Handbook free?

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

### Is Co free?

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

### Do Concise OB/GYN Handbook or Co have ads?

Neither Concise OB/GYN Handbook nor Co 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.*