# PDE Data Engineer Exam Prep vs AI, ML & Data Cert Exam Prep

The clearest difference is in-app purchases: PDE Data Engineer Exam Prep at none against AI, ML & Data Cert Exam Prep's 4. PDE Data Engineer Exam Prep also leads on iOS requirement (15.0 vs 18). AI, ML & Data Cert Exam Prep's advantage is update cadence (daily vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. AI, ML & Data Cert Exam Prep sells 4 in-app purchases, starting at $19.99 per month. PDE Data Engineer Exam Prep asks for nothing beyond the download.

PDE Data Engineer Exam Prep ships an update every 3 months, AI, ML & Data Cert Exam Prep daily. The most recent releases landed on October 11, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | PDE Data Engineer Exam Prep | AI, ML & Data Cert Exam Prep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Daily** |
| Size | 27 MB | 16 MB |
| Requires iOS | **15.0** | 18 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Davy Raitt](https://appshunter.io/developer/1795318281) | [Sunny Dasari](https://appshunter.io/developer/6798379765) |

## What reviewers say

### 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


### AI, ML & Data Cert Exam Prep

[App page](https://appshunter.io/ios/app/ai-ml-and-data-cert-exam-prep/id6799519419)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AI, ML & Data Cert Monthly | $19.99 | per month |
| AI, ML & Data Cert 3 Months | $39.99 | per 3 months |
| AI, ML & Data Cert 6 Months | $39.99 | per 6 months |
| AI, ML & Data Cert Yearly | $99.99 | per year |


## Frequently asked questions

### Is PDE Data Engineer Exam Prep free?

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

### Is AI, ML & Data Cert Exam Prep free?

AI, ML & Data Cert Exam Prep is free to download, with in-app purchases available.

### Do PDE Data Engineer Exam Prep or AI, ML & Data Cert Exam Prep have ads?

Neither PDE Data Engineer Exam Prep nor AI, ML & Data Cert Exam Prep shows ads.

### Which is updated more often, PDE Data Engineer Exam Prep or AI, ML & Data Cert Exam Prep?

PDE Data Engineer Exam Prep ships an update every 3 months, and AI, ML & Data Cert Exam Prep daily. Most recently, PDE Data Engineer Exam Prep was updated on October 11, 2026 and AI, ML & Data Cert Exam Prep on October 10, 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.*