クイズ相性診断for関ジャニカンジャニエイト検定 is a free Android app developed by zestapp. The app is categorized under Lifestyle and offers various quizzes related to the Japanese boy band, Kanjani Eight (関ジャニエイト). The app has three main features: Eito-Quiz, Compatibility Test, and Kanjani Quotes.

The Eito-Quiz consists of multiple-choice questions about the band, ranging from basic knowledge to rare facts and trivia. The Compatibility Test allows users to answer questions and determine their compatibility with each member of the group. The Kanjani Quotes feature offers a gallery of memorable quotes and sayings by the band members.

Overall, the app is an enjoyable experience for Kanjani Eight fans who want to test their knowledge and discover more about their favorite band. The app is entirely unofficial and is not affiliated with the band or any related companies or products.