Trivia Flow is a free Android app developed by SmartApp Designs that offers a fun way to test your knowledge of your favorite songs. With a series of questions, the app determines your level of "flow."

In addition to the trivia game, Trivia Flow also offers a new option where you can guess the song. This feature allows you to listen to a snippet of a song from the series and try to guess the title. The app also includes lyrics for some of the songs in the series.

Overall, Trivia Flow is an enjoyable app for fans of the series looking for a new way to engage with their favorite songs. The app's interface is clean and easy to navigate, and the trivia questions are challenging without being too difficult. The addition of the "guess the song" feature adds some variety to the app and keeps things interesting.