# SkillCert vs DCDEP Data Engineer Pro Prep

The clearest difference is in-app purchases: DCDEP Data Engineer Pro Prep at none against SkillCert's 3. DCDEP Data Engineer Pro Prep also leads on ads (none vs shown). SkillCert's advantage is update cadence (every 3 days vs every 4 months) and iOS requirement (13.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. SkillCert sells 3 in-app purchases, starting at $2.99 per month. DCDEP Data Engineer Pro Prep asks for nothing beyond the download.

SkillCert ships an update every 3 days, DCDEP Data Engineer Pro Prep every 4 months. The most recent releases landed on September 29, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | SkillCert | DCDEP Data Engineer Pro Prep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Every 4 months |
| Size | 155 MB | 27 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Yotaro SATO](https://appshunter.io/developer/1862063948) | [Davy Raitt](https://appshunter.io/developer/1795318281) |

## What reviewers say

### SkillCert

[App page](https://appshunter.io/ios/app/skillcert-mostcertifications/id6756679793)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SKILL Cert by AI ライトプラン | $2.99 | per month |
| SKILL Cert by AI スタンダードプラン | $9.99 | per month |
| SKILL Cert by AI プレミアムプラン | $29.99 | per month |


### DCDEP Data Engineer Pro Prep

[App page](https://appshunter.io/ios/app/dcdep-data-engineer-pro-prep/id6758736664)

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

**In-app purchases:** none


## Frequently asked questions

### Is SkillCert free?

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

### Is DCDEP Data Engineer Pro Prep free?

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

### Do SkillCert or DCDEP Data Engineer Pro Prep have ads?

SkillCert shows ads; DCDEP Data Engineer Pro Prep does not.

### Which is updated more often, SkillCert or DCDEP Data Engineer Pro Prep?

SkillCert ships an update every 3 days, and DCDEP Data Engineer Pro Prep every 4 months. Most recently, SkillCert was updated on September 29, 2026 and DCDEP Data Engineer Pro Prep on October 3, 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.*