# Certification Prep Pro vs Six Sigma Black Belt Training

The clearest difference is in-app purchases: Certification Prep Pro at none against Six Sigma Black Belt Training's 2. Six Sigma Black Belt Training's advantage is update cadence (every 10 days vs every 2 months) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Six Sigma Black Belt Training sells 2 one-off in-app purchases. Certification Prep Pro asks for nothing beyond the download.

Certification Prep Pro ships an update every 2 months, Six Sigma Black Belt Training every 10 days. The most recent releases landed on November 8, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Certification Prep Pro | Six Sigma Black Belt Training |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 10 days** |
| Size | 17 MB | 44 MB |
| Requires iOS | 17.5 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Coffeedevs LLC](https://appshunter.io/developer/1793357959) | [EXAMCERT PTY LTD](https://appshunter.io/developer/1830664214) |

## What reviewers say

### Certification Prep Pro

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

**Features:** macOS Compatibility

**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 Certification Prep Pro free?

Certification Prep Pro is free to download, 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 Certification Prep Pro or Six Sigma Black Belt Training have ads?

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

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

Certification Prep Pro ships an update every 2 months, and Six Sigma Black Belt Training every 10 days. Most recently, Certification Prep Pro was updated on November 8, 2026 and Six Sigma Black Belt Training on November 10, 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.*