Blues Harp is an Android app that offers a rhythmic school for blues harmonica players. Created by Peter Mad Ruth, the app provides a comprehensive description of various rhythmic techniques used in playing blues harmonica. You can also listen to the sound of these techniques performed by the author himself. The app does not require an internet connection.

Blues Harp is easy to navigate, with simple controls such as tapping the screen to hide/show control elements, double-tapping to display the page in full screen, and clicking on the player icon to start/stop audio playback. Swiping left takes you to the next page, while swiping right takes you to the previous page.