# Data Engineer Pro Prep vs Cloud Cert Prep

The clearest difference is update cadence: Cloud Cert Prep at every 5 days against Data Engineer Pro Prep's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Data Engineer Pro Prep sells 1 one-off in-app purchase and Cloud Cert Prep sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Data Engineer Pro Prep ships an update every 3 weeks, Cloud Cert Prep every 5 days. The most recent releases landed on September 20, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Data Engineer Pro Prep | Cloud Cert Prep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Size | 86 MB | 69 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [AITYTECH](https://appshunter.io/developer/1885549185) | [hei cyo](https://appshunter.io/developer/1740622676) |

## What reviewers say

### Data Engineer Pro Prep

[App page](https://appshunter.io/ios/app/data-engineer-pro-prep/id6762125643)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium - Lifetime | $3.99 | one-time |


### Cloud Cert Prep

[App page](https://appshunter.io/ios/app/cloud-cert-prep-mock-exams/id6773379862)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AWS AI Practitioner Question B | $9.99 | one-time |
| AWS Developer Associate Questi | $11.99 | one-time |
| AWS SysOps Administrator Quest | $11.99 | one-time |
| AWS Data Engineer Associate Qu | $11.99 | one-time |
| AWS Solutions Architect Associ | $11.99 | one-time |
| AWS Machine Learning Engineer | $11.99 | one-time |
| AWS DevOps Engineer Profession | $14.99 | one-time |
| AWS Solutions Architect Profes | $14.99 | one-time |
| AWS Advanced Networking Specia | $17.99 | one-time |
| AWS Security Specialty Questio | $17.99 | one-time |


## Frequently asked questions

### Is Data Engineer Pro Prep free?

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

### Is Cloud Cert Prep free?

Cloud Cert Prep is free to download, with in-app purchases available.

### Do Data Engineer Pro Prep or Cloud Cert Prep have ads?

Neither Data Engineer Pro Prep nor Cloud Cert Prep shows ads.

### Which is updated more often, Data Engineer Pro Prep or Cloud Cert Prep?

Data Engineer Pro Prep ships an update every 3 weeks, and Cloud Cert Prep every 5 days. Most recently, Data Engineer Pro Prep was updated on September 20, 2026 and Cloud Cert Prep on September 8, 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.*