# ACP MKSAP vs Oakstone CMEssentials

The clearest difference is in-app purchases: Oakstone CMEssentials at none against ACP MKSAP's 1. ACP MKSAP's advantage is update cadence (every 10 days vs every 2 months) and iOS requirement (13.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. ACP MKSAP sells 1 in-app purchase, starting at $999.99 per year. Oakstone CMEssentials asks for nothing beyond the download.

ACP MKSAP ships an update every 10 days, Oakstone CMEssentials every 2 months. The most recent releases landed on September 14, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | ACP MKSAP | Oakstone CMEssentials |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (16 ratings)](https://appshunter.io/ios/app/acp-mksap/id6739636797/reviews)** | — |
| Number of ratings | **16** | — |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 542 MB | 82 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [American College of Physicians](https://appshunter.io/developer/371090673) | [Oakstone Publishing, LLC](https://appshunter.io/developer/619447897) |

## What reviewers say

### ACP MKSAP

[App page](https://appshunter.io/ios/app/acp-mksap/id6739636797)

Access comprehensive internal medicine knowledge and practice exam-style questions offline. This app syncs your progress with the online version when connected to the internet. It's designed for physicians to stay updated on the latest evidence and enhance their clinical decision-making skills.

**Highlights:** Offline access to text and questions, Thousands of exam-like multiple-choice questions, Patient-based clinical scenarios, Syncs progress with online version, Includes figures, charts, and tables, Targets knowledge gaps

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Non-member in-app price | $999.99 | per year |


### Oakstone CMEssentials

[App page](https://appshunter.io/ios/app/oakstone-cmessentials/id6747255138)

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

**In-app purchases:** none


## Frequently asked questions

### Is ACP MKSAP free?

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

### Is Oakstone CMEssentials free?

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

### Do ACP MKSAP or Oakstone CMEssentials have ads?

Neither ACP MKSAP nor Oakstone CMEssentials shows ads.

### Which is updated more often, ACP MKSAP or Oakstone CMEssentials?

ACP MKSAP ships an update every 10 days, and Oakstone CMEssentials every 2 months. Most recently, ACP MKSAP was updated on September 14, 2026 and Oakstone CMEssentials on September 22, 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.*