Guitar Modal Pentatonic Scales is a multimedia application designed for iPhone users, focusing on the extensive range of modal pentatonic scales. This app provides musicians with a unique set of over 530 pentatonic scales that can be easily transposed, resulting in more than 6,300 total scales. The app includes a variety of features that facilitate learning, such as optimal fingerings for each scale, a harmony feature that allows users to see and listen to compatible chords, and a metrotone with adjustable tempo and time signature for practice sessions.

Additional functionalities include step-by-step note playback, manual note selection, and the ability to choose between two guitar sound banks. The app also supports stereo chorus effects, guitar reverb, and degree indicators for detailed scale analysis. Designed for both iPhone and iPad, Guitar Modal Pentatonic Scales serves as a valuable resource for musicians seeking to enhance their improvisational skills and understanding of pentatonic scales.