# Professional Data Engineer vs PDE Data Engineer Exam Prep

The clearest difference is in-app purchases: PDE Data Engineer Exam Prep at none against Professional Data Engineer's 1. PDE Data Engineer Exam Prep also leads on update cadence (every 3 months vs every 13 months). Professional Data Engineer's advantage is iOS requirement (10.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Professional Data Engineer sells 1 one-off in-app purchase. PDE Data Engineer Exam Prep asks for nothing beyond the download.

Professional Data Engineer ships an update every 13 months, PDE Data Engineer Exam Prep every 3 months. The most recent releases landed on September 21, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Professional Data Engineer | PDE Data Engineer Exam Prep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 3 months** |
| Size | 25 MB | 27 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Trieu Tran](https://appshunter.io/developer/1668827865) | [Davy Raitt](https://appshunter.io/developer/1795318281) |

## What reviewers say

### Professional Data Engineer

[App page](https://appshunter.io/ios/app/professional-data-engineer/id6473723698)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock complete App | $9.99 | one-time |


### PDE Data Engineer Exam Prep

[App page](https://appshunter.io/ios/app/pde-data-engineer-exam-prep/id6757119609)

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

**In-app purchases:** none


## Frequently asked questions

### Is Professional Data Engineer free?

Professional Data Engineer is free to download, with in-app purchases available.

### Is PDE Data Engineer Exam Prep free?

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

### Do Professional Data Engineer or PDE Data Engineer Exam Prep have ads?

Neither Professional Data Engineer nor PDE Data Engineer Exam Prep shows ads.

### Which is updated more often, Professional Data Engineer or PDE Data Engineer Exam Prep?

Professional Data Engineer ships an update every 13 months, and PDE Data Engineer Exam Prep every 3 months. Most recently, Professional Data Engineer was updated on September 21, 2026 and PDE Data Engineer Exam Prep on September 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*