# Six Sigma Green Belt Tutor — DMAIC, Lean & Statistics

> DMAIC, Lean & Statistics (iPhone/iPad app by MD Shahariar Nazim Joy.)

- Source: https://appshunter.io/ios/app/six-sigma-green-belt-tutor/id6791025346 (this page in markdown: same URL + `.md`)
- Developer: [MD Shahariar Nazim Joy](https://appshunter.io/developer/1893961943)
- Category: Education, Reference
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 3 MB
- Languages: American English
- Released: 2026-07-22
- Data updated: 2026-07-29
- User reviews in markdown: https://appshunter.io/ios/app/six-sigma-green-belt-tutor/id6791025346/reviews.md

## What is Six Sigma Green Belt Tutor?

Six Sigma Green Belt Prep is the focused way to study for your Lean Six Sigma Green Belt certification exam. Master the full DMAIC method — Define, Measure, Analyze, Improve, and Control — plus Lean fundamentals and the statistics every Green Belt needs.

A one-time purchase or subscription is required to use the app. There is no free tier. Unlock everything with a subscription (monthly or yearly) or a single lifetime purchase.

WHAT YOU GET
- 2,000+ original practice questions across all five DMAIC phases, Lean, and statistics
- Every answer has a detailed rationale that shows the reasoning or the full calculation
- Full-length timed mock exams with realistic phase weighting and pacing
- Quick practice, practice-by-phase, and weak-area drills built from your misses
- Flashcards with spaced repetition so the right cards come back at the right time
- A readiness score, per-phase mastery, accuracy trend, streak, and exam countdown
- Deep statistics coverage: DPMO, sigma level, Cp/Cpk, hypothesis tests, correlation, regression, and control-chart limits — worked step by step
- Works fully offline. No ads, no analytics, no account, no data collection

BUILT FOR THE EXAM
Content is organized the way Green Belt exams are: the five phases of DMAIC, Lean tools like 5S, value stream mapping, kanban and takt time, and the descriptive and inferential statistics that show up on every test. An Exam Info section explains the format and links to the official certifying bodies.

WHO IT'S FOR
Candidates preparing for ASQ CSSGB, IASSC ICGB, and employer or training-provider Green Belt exams, and anyone who wants a serious, structured refresher on Lean Six Sigma.

This app is independent study material. It is not affiliated with, endorsed by, or certified by ASQ, IASSC, or any other certifying body. All questions are original and are not real exam questions.

Privacy Policy: https://joykhansayan1.github.io/six-sigma-green-belt-prep/privacy.html
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Support: https://joykhansayan1.github.io/six-sigma-green-belt-prep/support.html

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Monthly Access | $9.99 | per month |
| Annual Access | $49.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime Access | $99.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-07-22

No release notes.

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All apps by MD Shahariar Nazim Joy: https://appshunter.io/developer/1893961943

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-29.*