HQ Trivia recently said that it'd make its Android app available to everyone by January 1st, and it looks like they just squeaked in under that deadline.
HQ Trivia is now available in the Play Store. The app is listed as "(Unreleased)", and so you may encounter a bug or two while using it, but now anyone with a device running Android 5.1 or higher can get the app.
Players of HQ Trivia can take part in a live trivia game show every day at 9:00 pm EST and weekdays at 3:00 pm EST. You're asked 12 trivia questions, but if you get one wrong, you're eliminated from that game. Get all 12 questions right and you'll win a piece of that game's real money prize, which is split between everyone that got all 12 questions correct. The prize amount varies with each game.
During its first months of availability on iOS, HQ Trivia became an extremely popular app. It typically has hundreds of thousands of people playing each game, and that number will likely grow now that it's available on Android. To give HQ Trivia a try for yourself, hit the Google Play Store link below.