# Ferri's Best Test vs CRDx Academy

The clearest difference is ads: CRDx Academy at none against Ferri's Best Test's shown. CRDx Academy also leads on update cadence (every 2 months vs every 6 months). Ferri's Best Test's advantage is iOS requirement (13.0 vs 15.2). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Ferri's Best Test sells 1 one-off in-app purchase and CRDx Academy sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Ferri's Best Test ships an update every 6 months, CRDx Academy every 2 months. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Ferri's Best Test | CRDx Academy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (26 ratings)](https://appshunter.io/ios/app/ferris-best-test-lab-guide/id1243450037/reviews)** | — |
| Number of ratings | **26** | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Free with in-app purchases | — |
| Size | 149 MB | 110 MB |
| Requires iOS | **13.0** | 15.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Skyscape Medpresso Inc](https://appshunter.io/developer/818609416) | [Credit Hours](https://appshunter.io/developer/1627681353) |

## What reviewers say

### Ferri's Best Test

[App page](https://appshunter.io/ios/app/ferris-best-test-lab-guide/id1243450037)

This medical reference app provides guidance on laboratory and imaging approaches for over 400 tests and 230 diseases. It features interactive flowcharts, IU units, and concise clinical material to aid in test selection and diagnostic skills.

**Highlights:** Over 400+ tests and labs, Guidance on radio-logic & laboratory approaches, 230+ common diseases, Interactive flowcharts, IU units for all tests, SmartSearch technology

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ferri's Best Test - Lab & Diag | $40.99 | one-time |


### CRDx Academy

[App page](https://appshunter.io/ios/app/crdx-academy/id6760403603)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Measurement of HbA1c in DM | Free | one-time |
| Science of RBC Morphology | Free | one-time |


## Frequently asked questions

### Is Ferri's Best Test free?

Ferri's Best Test is free to download, with in-app purchases available.

### Is CRDx Academy free?

CRDx Academy is free to download, with in-app purchases available.

### Do Ferri's Best Test or CRDx Academy have ads?

Ferri's Best Test shows ads; CRDx Academy does not.

### Which is updated more often, Ferri's Best Test or CRDx Academy?

Ferri's Best Test ships an update every 6 months, and CRDx Academy every 2 months. Most recently, Ferri's Best Test was updated on October 24, 2026 and CRDx Academy on October 28, 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.*