# Data Engineer Cert Prep vs ADP GCP Data Practitioner Prep

The clearest difference is in-app purchases: Data Engineer Cert Prep at none against ADP GCP Data Practitioner Prep's 3. ADP GCP Data Practitioner Prep's advantage is update cadence (every 3 months vs every 13 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ADP GCP Data Practitioner Prep sells 3 in-app purchases, starting at $3.99 per month. Data Engineer Cert Prep asks for nothing beyond the download.

Data Engineer Cert Prep ships an update every 13 months, ADP GCP Data Practitioner Prep every 3 months. Both last shipped on October 25, 2026.

## The numbers

| Metric | Data Engineer Cert Prep | ADP GCP Data Practitioner Prep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 3 months** |
| Size | 1 MB | 27 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DjamgaTech Corp](https://appshunter.io/developer/969000181) | [Davy Raitt](https://appshunter.io/developer/1795318281) |

## What reviewers say

### Data Engineer Cert Prep

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

**Features:** Vision Pro support

**In-app purchases:** none


### ADP GCP Data Practitioner Prep

[App page](https://appshunter.io/ios/app/adp-gcp-data-practitioner-prep/id6756809464)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $3.99 | per month |
| Pro Yearly | $14.99 | per year |
| Pro Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is Data Engineer Cert Prep free?

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

### Is ADP GCP Data Practitioner Prep free?

ADP GCP Data Practitioner Prep is free to download, with in-app purchases available.

### Do Data Engineer Cert Prep or ADP GCP Data Practitioner Prep have ads?

Neither Data Engineer Cert Prep nor ADP GCP Data Practitioner Prep shows ads.

### Which is updated more often, Data Engineer Cert Prep or ADP GCP Data Practitioner Prep?

Data Engineer Cert Prep ships an update every 13 months, and ADP GCP Data Practitioner Prep every 3 months. Most recently, Data Engineer Cert Prep was updated on October 25, 2026 and ADP GCP Data Practitioner Prep on October 25, 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.*