# Six Sigma Green Belt Prep vs CQA Exam Study Guide

The clearest difference is rating: CQA Exam Study Guide at 5.0 against Six Sigma Green Belt Prep's 4.0. CQA Exam Study Guide also leads on update cadence (every 3 weeks vs every 2 months) and device support (3 vs 1). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Six Sigma Green Belt Prep sells 3 in-app purchases, starting at $9.99 per month and CQA Exam Study Guide sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

CQA Exam Study Guide holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Six Sigma Green Belt Prep ships an update every 2 months, CQA Exam Study Guide every 3 weeks. The most recent releases landed on November 5, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Six Sigma Green Belt Prep | CQA Exam Study Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/six-sigma-green-belt-prep/id6763969601/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cqa-exam-study-guide/id6800809957/reviews)** |
| Number of ratings | 1 | 1 |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 6 MB | 19 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Deeun Inc.](https://appshunter.io/developer/1691824695) | [DMP ENTERPRISE LLC](https://appshunter.io/developer/1808322033) |

## What reviewers say

### Six Sigma Green Belt Prep

[App page](https://appshunter.io/ios/app/six-sigma-green-belt-prep/id6763969601)

Prepare for your ASQ Green Belt or Black Belt certification exam with comprehensive study materials. Master statistical tools, control charts, and process capability calculations with practice questions and detailed explanations.

**Highlights:** ASQ CSSGB/CSSBB exam preparation, Statistical tools and concepts, Control chart selector, Process capability calculator, 1,000+ practice questions, Detailed question explanations

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Access | $9.99 | per month |
| Annual Access | $24.99 | per year |
| SixSigma - Lifetime Pro | $49.99 | one-time |


### CQA Exam Study Guide

[App page](https://appshunter.io/ios/app/cqa-exam-study-guide/id6800809957)

Prepare for the Certified Quality Auditor exam with a comprehensive study guide. It covers all five exam domains based on the latest Body of Knowledge, offering flashcards, quizzes, and a glossary. Study offline with no ads or sign-up required.

**Highlights:** Aligned to 2026 Body of Knowledge, Organized by exam domains, 165 flashcards, 126 multiple-choice questions, 100 true/false drills, Term-matching game, Searchable glossary and models

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $1.99 | per month |
| Premium Lifetime | $15.00 | one-time |


## Frequently asked questions

### Is Six Sigma Green Belt Prep free?

Six Sigma Green Belt Prep is free to download, with in-app purchases available.

### Is CQA Exam Study Guide free?

CQA Exam Study Guide is free to download, with in-app purchases available.

### Which has better reviews, Six Sigma Green Belt Prep or CQA Exam Study Guide?

CQA Exam Study Guide is rated higher. Six Sigma Green Belt Prep averages 4.0 out of 5 from 1 ratings, while CQA Exam Study Guide averages 5.0 from 1 ratings.

### Do Six Sigma Green Belt Prep or CQA Exam Study Guide have ads?

Neither Six Sigma Green Belt Prep nor CQA Exam Study Guide shows ads.

### Which is updated more often, Six Sigma Green Belt Prep or CQA Exam Study Guide?

Six Sigma Green Belt Prep ships an update every 2 months, and CQA Exam Study Guide every 3 weeks. Most recently, Six Sigma Green Belt Prep was updated on November 5, 2026 and CQA Exam Study Guide on October 29, 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.*