Great question! We expect you to ask this since we were a free app once upon a time. Our intention (and wish) is to offer you the best content including your favorite songs to learn on the guitar. With Universal Music on board, we have licensing costs of songs which we feature in the app and have to share from our revenue generation. We have come a long way with your love and support and we do not wish to face the same fate as other music tech start-ups which unfortunately shut down due to lack of funds. We are a small team and want to be able to provide you with the best content and best support to learn guitar while striving to keep away from featuring any in-app advertising, like you, we hate it too.