# PE Prep Pro vs Six Sigma Black Belt Training

The clearest difference is price: Six Sigma Black Belt Training at Free against PE Prep Pro's $34.99. Six Sigma Black Belt Training also leads on update cadence (every 10 days vs every 3 weeks). PE Prep Pro's advantage is in-app purchases (none vs 2). On ads, device support and iOS requirement there is nothing between them.

Six Sigma Black Belt Training is free to download; PE Prep Pro costs $34.99 up front. Six Sigma Black Belt Training sells 2 one-off in-app purchases. PE Prep Pro asks for nothing beyond the download.

PE Prep Pro ships an update every 3 weeks, Six Sigma Black Belt Training every 10 days. The most recent releases landed on November 5, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | PE Prep Pro | Six Sigma Black Belt Training |
| --- | --- | --- |
| Price | $34.99 | **Free** |
| Rating | **[1.7 (3 ratings)](https://appshunter.io/ios/app/pe-prep-pro/id6746470072/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Monetization | Paid | — |
| Size | 43 MB | 44 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | +4 | 4+ |
| Developer | [Examp, LLC](https://appshunter.io/developer/1479303574) | [EXAMCERT PTY LTD](https://appshunter.io/developer/1830664214) |

## What reviewers say

### PE Prep Pro

[App page](https://appshunter.io/ios/app/pe-prep-pro/id6746470072)

This comprehensive exam preparation system offers over 1,400 realistic practice questions across 16 engineering disciplines. It provides detailed performance analytics to pinpoint weak areas and includes essential code summaries for offline study.

**Highlights:** 1,400+ realistic exam questions, 16 major engineering disciplines, Performance analytics, Offline functionality, Essential code summaries

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

**In-app purchases:** none


### Six Sigma Black Belt Training

[App page](https://appshunter.io/ios/app/six-sigma-black-belt-training/id6779500020)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 200 AI Credits | $1.99 | one-time |
| UNlock Premium | $5.99 | one-time |


## Frequently asked questions

### Is PE Prep Pro free?

PE Prep Pro costs $34.99, with no in-app purchases.

### Is Six Sigma Black Belt Training free?

Six Sigma Black Belt Training is free to download, with in-app purchases available.

### Do PE Prep Pro or Six Sigma Black Belt Training have ads?

Neither PE Prep Pro nor Six Sigma Black Belt Training shows ads.

### Which is updated more often, PE Prep Pro or Six Sigma Black Belt Training?

PE Prep Pro ships an update every 3 weeks, and Six Sigma Black Belt Training every 10 days. Most recently, PE Prep Pro was updated on November 5, 2026 and Six Sigma Black Belt Training 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.*