# Izzy Study vs CDL HazMat

The clearest difference is iOS requirement: Izzy Study at 10.0 against CDL HazMat's 13.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Izzy Study | CDL HazMat |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | — | Fortnightly |
| Size | 40 MB | 24 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bryan Oswaldo Gomez Perez](https://appshunter.io/developer/1573114808) | [Mert Demir](https://appshunter.io/developer/1864769723) |

## What reviewers say

### Izzy Study

[App page](https://appshunter.io/ios/app/izzy-study/id1576429792)

**Features:** macOS Compatibility

**In-app purchases:** none


### CDL HazMat

[App page](https://appshunter.io/ios/app/cdl-hazmat-audio-prep-2026/id6758774591)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Izzy Study free?

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

### Is CDL HazMat free?

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

### Do Izzy Study or CDL HazMat have ads?

Both Izzy Study and CDL HazMat show ads.

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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.*