# Data Engineer Pro Prep vs Hourly DSA

The clearest difference is update cadence: Hourly DSA at every 4 days against Data Engineer Pro Prep's every 3 weeks. Data Engineer Pro Prep's advantage is device support (4 vs 1) and iOS requirement (13.0 vs 16.4). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Data Engineer Pro Prep sells 1 one-off in-app purchase and Hourly DSA sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Data Engineer Pro Prep ships an update every 3 weeks, Hourly DSA every 4 days. The most recent releases landed on October 7, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Data Engineer Pro Prep | Hourly DSA |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Size | 86 MB | 66 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [AITYTECH](https://appshunter.io/developer/1885549185) | [Caleb Lee](https://appshunter.io/developer/1849770282) |

## 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 |


### Hourly DSA

[App page](https://appshunter.io/ios/app/hourly-dsa-interview-prep/id6807262406)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hourly DSA Monthly | $4.99 | per month |
| Hourly DSA Annual | $29.99 | per year |


## Frequently asked questions

### Is Data Engineer Pro Prep free?

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

### Is Hourly DSA free?

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

### Do Data Engineer Pro Prep or Hourly DSA have ads?

Neither Data Engineer Pro Prep nor Hourly DSA shows ads.

### Which is updated more often, Data Engineer Pro Prep or Hourly DSA?

Data Engineer Pro Prep ships an update every 3 weeks, and Hourly DSA every 4 days. Most recently, Data Engineer Pro Prep was updated on October 7, 2026 and Hourly DSA on October 2, 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.*