# Big Data Knowledge Test vs Certification Prep Pro

The clearest difference is in-app purchases: Certification Prep Pro at none against Big Data Knowledge Test's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Big Data Knowledge Test sells 2 in-app purchases, starting at $13.99 per month. Certification Prep Pro asks for nothing beyond the download.

Big Data Knowledge Test ships an update every 3 months, Certification Prep Pro every 2 months. The most recent releases landed on September 27, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Big Data Knowledge Test | Certification Prep Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Size | 9 MB | 17 MB |
| Requires iOS | **17.2** | 17.5 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Cargo Teleport Inc](https://appshunter.io/developer/1761832181) | [Coffeedevs LLC](https://appshunter.io/developer/1793357959) |

## What reviewers say

### Big Data Knowledge Test

[App page](https://appshunter.io/ios/app/big-data-knowledge-test/id6740737722)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium monthly subscription | $13.99 | per month |
| Lifetime version | $24.99 | one-time |


### Certification Prep Pro

[App page](https://appshunter.io/ios/app/certification-prep-pro/id6741158449)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Big Data Knowledge Test free?

Big Data Knowledge Test is free to download, with in-app purchases available.

### Is Certification Prep Pro free?

Certification Prep Pro is free to download, with no in-app purchases.

### Do Big Data Knowledge Test or Certification Prep Pro have ads?

Neither Big Data Knowledge Test nor Certification Prep Pro shows ads.

### Which is updated more often, Big Data Knowledge Test or Certification Prep Pro?

Big Data Knowledge Test ships an update every 3 months, and Certification Prep Pro every 2 months. Most recently, Big Data Knowledge Test was updated on September 27, 2026 and Certification Prep Pro on October 7, 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.*