# What Doctors Know vs CURRENT CMDT Study Guide, 2/E

The clearest difference is price: What Doctors Know at Free against CURRENT CMDT Study Guide, 2/E's $29.99. What Doctors Know also leads on update cadence (every 4 months vs every 17 months). CURRENT CMDT Study Guide, 2/E's advantage is in-app purchases (none vs 14) and iOS requirement (10.0 vs 13.0). On ads and device support there is nothing between them.

What Doctors Know is free to download; CURRENT CMDT Study Guide, 2/E costs $29.99 up front. What Doctors Know sells 14 in-app purchases, starting at $5.99 per year. CURRENT CMDT Study Guide, 2/E asks for nothing beyond the download.

What Doctors Know ships an update every 4 months, CURRENT CMDT Study Guide, 2/E every 17 months. The most recent releases landed on September 19, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | What Doctors Know | CURRENT CMDT Study Guide, 2/E |
| --- | --- | --- |
| Price | **Free** | $29.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 17 months |
| Size | 12 MB | 52 MB |
| Requires iOS | 13.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [PressPad Sp. z o.o.](https://appshunter.io/developer/449000752) | [Usatine & Erickson Media LLC](https://appshunter.io/developer/1466894388) |

## What reviewers say

### What Doctors Know

[App page](https://appshunter.io/ios/app/what-doctors-know/id880982965)

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

**In-app purchases (14)**

| Purchase | Price | Billing |
| --- | --- | --- |
| What Doctors Know | $5.99 | per year |
| Issue #1 | $0.99 | one-time |
| Issue #2 | $0.99 | one-time |
| Issue #3 | $0.99 | one-time |
| Issue #95 | $0.99 | one-time |
| Issue #96 | $0.99 | one-time |
| Issue #97 | $0.99 | one-time |
| Issue #98 | $0.99 | one-time |
| Issue #99 | $0.99 | one-time |
| Issue #100 | $0.99 | one-time |
| Issue #91 | $0.99 | one-time |
| Issue #92 | $0.99 | one-time |
| Issue #93 | $0.99 | one-time |
| Issue #94 | $0.99 | one-time |


### CURRENT CMDT Study Guide, 2/E

[App page](https://appshunter.io/ios/app/current-cmdt-study-guide-2e/id1154116650)

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

**In-app purchases:** none


## Frequently asked questions

### Is What Doctors Know free?

What Doctors Know is free to download, with in-app purchases available.

### Is CURRENT CMDT Study Guide, 2/E free?

CURRENT CMDT Study Guide, 2/E costs $29.99, with no in-app purchases.

### Do What Doctors Know or CURRENT CMDT Study Guide, 2/E have ads?

Neither What Doctors Know nor CURRENT CMDT Study Guide, 2/E shows ads.

### Which is updated more often, What Doctors Know or CURRENT CMDT Study Guide, 2/E?

What Doctors Know ships an update every 4 months, and CURRENT CMDT Study Guide, 2/E every 17 months. Most recently, What Doctors Know was updated on September 19, 2026 and CURRENT CMDT Study Guide, 2/E on September 9, 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.*