Castle Quiz is an Android application by Everbrend, available for free on the Google Play Store. It is an educational quiz game that challenges users with questions on various topics such as world history, psychology, filmmaking, neurobiology, and movie history. The app offers new topics every week, making it an excellent tool for anyone looking to broaden their knowledge and challenge themselves.

Castle Quiz uses scientifically proven productive failure technique to help users learn from their mistakes. The app encourages users to answer difficult questions and provides detailed explainers written by real experts. Additionally, Castle Quiz offers a collection of editor-picked YouTube videos to build on new knowledge.

Overall, Castle Quiz is an excellent way to procrastinate, challenge yourself, and learn something new every day. It is compatible with Android 9.0 and is a great choice for anyone interested in education and reference apps.