# First Aid Cases USMLE Step 2 vs CathDoc

The clearest difference is in-app purchases: CathDoc at none against First Aid Cases USMLE Step 2's 1. CathDoc also leads on ads (none vs shown). First Aid Cases USMLE Step 2's advantage is iOS requirement (13.0 vs 15.6). On price and device support there is nothing between them.

Both are free to download. First Aid Cases USMLE Step 2 sells 1 one-off in-app purchase. CathDoc asks for nothing beyond the download.

## The numbers

| Metric | First Aid Cases USMLE Step 2 | CathDoc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | — | Every 3 weeks |
| Size | 149 MB | 12 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Skyscape Medpresso Inc](https://appshunter.io/developer/818609416) | [Lumen Innovations, LLC](https://appshunter.io/developer/1489598636) |

## What reviewers say

### First Aid Cases USMLE Step 2

[App page](https://appshunter.io/ios/app/first-aid-cases-usmle-step-2/id6746171211)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| First Aid Cases USMLE Step 2CK | $38.99 | one-time |


### CathDoc

[App page](https://appshunter.io/ios/app/cathdoc/id6757081293)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is First Aid Cases USMLE Step 2 free?

First Aid Cases USMLE Step 2 is free to download, with in-app purchases available.

### Is CathDoc free?

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

### Do First Aid Cases USMLE Step 2 or CathDoc have ads?

First Aid Cases USMLE Step 2 shows ads; CathDoc does not.

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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.*