The Good News! We are working on a WEB version of Class Builder that will open the app to all mobile devices, and offer a plethora of new features for all users - even iOS device owners.
The Bad News! Spotify has clarified its position for developers like us who have integrated their app.
They will only permit it for free apps. Consequently we are building a "player" that will be free and thus can integrate with spotify while the version of the app that is used to BUILD the classes will remain in the current app.
If you use Spotify, turn off "auto-updates" so you do not lose your Spotify features until we create the player and a method to move all of your classes over to it.
Version 2.8.1 will be the last version to use Spotify.