About this app
A study app for the Japan QC検定® (Quality Control Certification) Semi-Grade 1 exam. Study efficiently with practice questions and detailed explanations across all 10 subjects. ■ Subjects Covered - Probability Distributions - Statistical Estimation and Testing - Control Charts - Process Capability Index - Sampling Inspection - Design of Experiments - Regression and Multivariate Analysis - Reliability Engineering - Quality Control in Practice - Elements of Quality Management ■ Study Modes - Random practice (10 / 25 / 50 / 100 questions) - Study by subject - All questions in order (resume supported) - Review incorrect answers - Bookmarks and unanswered questions ■ Progress Tracking - Automatic tracking of correct answer rate - Subject-by-subject performance overview Works completely offline — study anytime, anywhere. QC検定® is a registered trademark of the Japanese Standards Association. This content has not been approved, endorsed, or otherwise reviewed by the Japanese Standards Association.
Latest release
What’s New
Minor fixes.
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 25, 2026 · 6:57 PM Free
Screenshots
