# Az DP vs Data Engineer Cert Prep

The clearest difference is in-app purchases: Data Engineer Cert Prep at none against Az DP's 1. Az DP's advantage is iOS requirement (10.0 vs 16.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Az DP sells 1 one-off in-app purchase. Data Engineer Cert Prep asks for nothing beyond the download.

Az DP ships an update every 10 months, Data Engineer Cert Prep every 13 months. The most recent releases landed on September 10, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Az DP | Data Engineer Cert Prep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 13 months |
| Size | 25 MB | 1 MB |
| Requires iOS | **10.0** | 16.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Trieu Tran](https://appshunter.io/developer/1395838483) | [DjamgaTech Corp](https://appshunter.io/developer/969000181) |

## What reviewers say

### Az DP

[App page](https://appshunter.io/ios/app/az-dp-300-updated-2026/id1658327980)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Premium Content | $7.99 | one-time |


### Data Engineer Cert Prep

[App page](https://appshunter.io/ios/app/data-engineer-cert-prep/id6566170013)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Az DP free?

Az DP is free to download, with in-app purchases available.

### Is Data Engineer Cert Prep free?

Data Engineer Cert Prep is free to download, with no in-app purchases.

### Do Az DP or Data Engineer Cert Prep have ads?

Neither Az DP nor Data Engineer Cert Prep shows ads.

### Which is updated more often, Az DP or Data Engineer Cert Prep?

Az DP ships an update every 10 months, and Data Engineer Cert Prep every 13 months. Most recently, Az DP was updated on September 10, 2026 and Data Engineer Cert Prep on September 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.*