1. Although chord progressions are not subject to copyright, we received a take down notice, and being a small independent developer we don't have the resources to fight for the cause, so we decided to remove all songs from the app. However the original chord charts and even more can be downloaded from the Forums in a few simple steps. (See tutorials inside the app)
  2. The 'Book' part of the app name started to become limiting given the new play along features of the app.