BluesHarpHelper is a free Android app developed by Fedor.Rusak under the multimedia category and subcategory of Music & Radio. As the name suggests, it is a nerdy app that assists blues harmonica players in navigating through notes on the instrument.

The app displays harmonica notes according to octaves and allows for easy transposition of selected notes by pressing special arrow buttons. But that's not all, the app also features a "note button" that enables users to tap screen elements and create music.

Overall, BluesHarpHelper is a useful tool for blues harmonica players who want to enhance their playing skills and learn new techniques. It is easy to use and navigate, making it a great addition to any musician's toolkit.