Endless Quiz is a free Android app developed by Timleg that challenges your general knowledge with thousands of hand-selected questions from various categories. The quiz is designed to test your level of education and contains only general knowledge "fact" type of questions, with no trivia questions from popular culture.

The app features questions from categories such as History, Literature, Science, Technology, Geography, Arts, Humanities, and General. The questions are linked to Wikipedia articles, so you can learn new things after answering.

Endless Quiz provides an endless stream of general knowledge questions, and new questions are added weekly. You can track your progress with an Elo number and compare yourself to other players. Additionally, you can test your skills in matches against other players. The app is also available on Wear OS, so you can play it on your smartwatch.

Overall, Endless Quiz is an excellent app for anyone who wants to challenge their general knowledge and learn new things along the way.