some of the functions are locked in free version and you can buy them later if you like the app it also has different note tunes for all arabic/turkish/iranian/majour/minor , ... types of music its very easy to use and i promise if you buy it you will be amazed !!! just try it the app specifics are : - oriental middle east rhythm styles - has accords that are used in this type of music - has quarter flat tunes that is used in oriental musics - has different tunes for different types of musics - has ability to change the rhythm speed - transpose ability from -20 to +20 percents - real sound that is made in professional studio - pitch ability to pitch the notes during the playing its free , download it and be amazed