Hearing PRO is an iPhone application designed for musicians to improve their relative or absolute pitch through ear training exercises. The app focuses on helping users practice melodic dictations, read music notes, and enhance their ability to sing according to notes. With a variety of instruments available for practice including vocals, piano, guitar, and more, users can develop their musical hearing effectively.

Users can work on different types of musical notations such as C D E F G A B, Do Re Mi Fa Sol La Si, and variations in different languages like Russian, Greek, Japanese, Korean, Hindi, and Thai. Hearing PRO provides a comprehensive platform for musicians to enhance their musical skills and ear training proficiency.