I made a trivia app so my high school Quiz Bowl(an academic competitive trivia game) team could practice for our tournaments. My app is called Quiz Watch, and it’s available on the iOS App Store now(it’s under my Dad’s name since I’m too young to have my own Apple Developer Account). I’d appreciate if you’d check it out. An Android version will likely come out in the future as well. My app has only been out for two weeks and tens of thousands of questions have already been done.
Note: If you search for it on the iOS App Store, search “Quizwatch” as one word, or you could click on this link on mobile to link directly to the App Store