Quiz MTS is a free Android app developed by RNS Technology that aims to teach musical theory using the MTS (Method of Theory and Sight-Reading) applied in the CCB (Christian Congregation in Brazil). The app is designed to help teachers, beginners, and advanced students to better understand musical theory through a quiz game format.

The app covers modules 1 to 6 of the MTS theory, as well as a random mode and a ranking screen. Additionally, users have access to video lessons for these modules. With its user-friendly interface and comprehensive content, Quiz MTS is a great tool for anyone who wants to learn musical theory.