Hey guys. I am looking for some good apps to put on my phone (Android OS) to help me learn bass, reading music or music reading as it applies to bass. It would be nice to have something that I can work with on the go. I have had success with similar teaching apps that turn lessons into games. (example Duo-Lingo for learning another language) Those types of apps keep me more engaged. Any ideas/reviews/recommendations are highly appreciated. Thanks!!