AWESOME!!!

I rarely rate apps but this one is so outstanding that I felt compelled to do so. If you aspire to learn and deeply internalize music theory then this is your tool. The app provides insightful and well presented music theory concepts. After each lesson you are given the option to test your knowledge. The practice exercises are awesome. My progress is exponential compared to other learning methods, such as books, video courses, etc. Want to learn every note on the guitar fingerboard? This app lets you practice using guitar and other instruments. Its fun to use as well. Seriously outstanding!!!

ZenBanjo about Music Theory by Musicopoulos, v2.6.1