# CompTIA DataX Prep vs Quarry

The clearest difference is monetization model: Quarry at free against CompTIA DataX Prep's subscription. CompTIA DataX Prep's advantage is iOS requirement (16.0 vs 18.0). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. CompTIA DataX Prep sells 2 in-app purchases, starting at $9.99 per month and Quarry sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for CompTIA DataX Prep against 5.0 for Quarry. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

CompTIA DataX Prep ships an update every 5 weeks, Quarry every 2 months. The most recent releases landed on October 30, 2026 and November 13, 2026 respectively.

## The numbers

| Metric | CompTIA DataX Prep | Quarry |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/comptia-datax-prep/id6670740937/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/quarry-sql-and-data-interview/id6785931623/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | Subscription | **Free** |
| Size | 12 MB | 129 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Cargo Teleport Inc](https://appshunter.io/developer/1761832181) | [Mayank Gulaty](https://appshunter.io/developer/1850701548) |

## What reviewers say

### CompTIA DataX Prep

[App page](https://appshunter.io/ios/app/comptia-datax-prep/id6670740937)

Prepare for the CompTIA DataX certification with this app. It offers a comprehensive curriculum, real-world simulations, and in-depth practice questions to validate your advanced data science skills. Receive expert feedback to target areas for improvement and elevate your career.

**Highlights:** Comprehensive curriculum on data science concepts, Real-world scenario simulations, In-depth practice questions, Expert performance feedback, Preparation for CompTIA DataX certification

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium monthly subscription | $9.99 | per month |
| Lifetime version | $24.99 | one-time |


### Quarry

[App page](https://appshunter.io/ios/app/quarry-sql-and-data-interview/id6785931623)

Practice data engineering interviews offline with real SQL and Python coding challenges. Get instant feedback on your solutions and learn from detailed explanations. Designed for mobile devices, it offers a private and focused learning environment.

**Highlights:** Offline SQL and Python practice, Instant grading and feedback, Company-style interview problems, 168 problems across SQL, pandas, and Python, Free-form coding playground, Hints and full solutions

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Yearly | $19.99 | per year |
| Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is CompTIA DataX Prep free?

CompTIA DataX Prep is free to download, with in-app purchases available.

### Is Quarry free?

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

### Which has better reviews, CompTIA DataX Prep or Quarry?

CompTIA DataX Prep and Quarry are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do CompTIA DataX Prep or Quarry have ads?

Neither CompTIA DataX Prep nor Quarry shows ads.

### Which is updated more often, CompTIA DataX Prep or Quarry?

CompTIA DataX Prep ships an update every 5 weeks, and Quarry every 2 months. Most recently, CompTIA DataX Prep was updated on October 30, 2026 and Quarry on November 13, 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.*