Six Sigma Black Belt Prep

Prepare for the Lean Six Sigma Black Belt exam with 150 original offline practice questions and clear explanations.

Get ready for the Lean Six Sigma Black Belt exam with 150 original practice questions across 10 topic areas you can study anytime, anywhere - completely offline.

Disclaimer: This is an unofficial, independent study app. It is not affiliated with, endorsed by, or sponsored by ASQ / IASSC aligned. "Six Sigma" and "Black Belt" are associated with ASQ/IASSC. All questions are original and based on publicly available information about the exam objectives.

What you get

• 150 multiple-choice questions, each with a clear explanation
• 10 topic areas mirroring the real exam domains: DMAIC, MSA, capability, hypothesis testing, DOE, SPC
• Study by topic, a shuffled Random mode, or a timed Mock Exam
• Instant feedback with the correct answer and why it is right
• Automatic review list of missed questions plus bookmarks
• 100% offline - no account, no login, no ads, and no data collection
• One-time purchase; every feature is unlocked from the start

How to use

1. Open the app - no account or login is required.
2. Choose a topic, Random, or Mock Exam from the Home screen.
3. Answer each question and tap Submit to see the correct answer and explanation.
4. Revisit missed questions and bookmarks anytime; progress is saved locally on your device.

This is a one-time paid app. All 150 questions are bundled inside the app as static content, and nothing is ever collected or uploaded.