四字熟語クイズ - はんぷく一般常識 is a popular educational game developed by Gakko Net Inc. This iPhone app features a collection of 137 four-character idioms, known as "yojijukugo" in Japanese, which are commonly used in books, newspapers, and everyday conversations.

The idioms cover various themes such as personality, decision-making, effort, behavior, and human relationships. This app is a great tool for testing and improving your knowledge of these idiomatic expressions. It has gained popularity and has been featured on television.

The 四字熟語クイズ - はんぷく一般常識 app is completely free to use. You can access all the quizzes without any charges. However, please note that the app displays advertisements, as it is supported by an advertising network.

This app is part of the "はんぷくシリーズ" of popular learning apps, which has accumulated a total of 30 million downloads, including the "ことわざクイズ" app. "はんぷく" is a registered trademark of Gakko Net Inc.