# Case Files Microbiology, 3e vs PolyHub

The clearest difference is in-app purchases: PolyHub at none against Case Files Microbiology, 3e's 5. PolyHub also leads on update cadence (every 8 months vs every 20 months) and iOS requirement (11.0 vs 15.0). Case Files Microbiology, 3e's advantage is device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Case Files Microbiology, 3e sells 5 in-app purchases, starting at $8.99 per 7 days. PolyHub asks for nothing beyond the download.

Case Files Microbiology, 3e ships an update every 20 months, PolyHub every 8 months. The most recent releases landed on October 24, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Case Files Microbiology, 3e | PolyHub |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/case-files-microbiology-3e/id955282108/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 8 months** |
| Monetization | Free with in-app purchases | — |
| Size | 19 MB | 21 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 12+ | 17+ |
| Developer | [Expanded Apps](https://appshunter.io/developer/313709778) | [BMC Medical Co.Ltd.](https://appshunter.io/developer/1318649724) |

## What reviewers say

### Case Files Microbiology, 3e

[App page](https://appshunter.io/ios/app/case-files-microbiology-3e/id955282108)

Master medical microbiology through interactive patient cases and USMLE-style questions. This app helps students learn essential concepts by applying them to real-life scenarios, preparing them for exams and clinical practice.

**Highlights:** 54 high-yield patient cases, USMLE-style review questions, Interactive study modes (Study, Exam, Bookmark), Clear concept discussions, Progress tracking, Note-taking and tagging

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Week | $8.99 | per 7 days |
| Weekly Access | $10.99 | per 7 days |
| Monthly Access | $19.99 | per month |
| 1 Year | $79.99 | per year |
| Lifetime Access | $39.99 | one-time |


### PolyHub

[App page](https://appshunter.io/ios/app/polyhub/id1271996048)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Case Files Microbiology, 3e free?

Case Files Microbiology, 3e is free to download, with in-app purchases available.

### Is PolyHub free?

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

### Do Case Files Microbiology, 3e or PolyHub have ads?

Neither Case Files Microbiology, 3e nor PolyHub shows ads.

### Which is updated more often, Case Files Microbiology, 3e or PolyHub?

Case Files Microbiology, 3e ships an update every 20 months, and PolyHub every 8 months. Most recently, Case Files Microbiology, 3e was updated on October 24, 2026 and PolyHub on October 14, 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.*