Challenge Citadel is a passion project by a single developer (me). Almost every evening I do a little quiz with my kids, and at some point I started thinking about how to make that easier and more fun. That idea grew into Challenge Citadel.
The platform is fully free and built around community input: your quizzes, ratings, and feedback shape what’s on the site. In the future, a more serious, in-depth layer may be added that could become a premium offering, but the core experience will stay free and community-driven.