Creating the perfect playlist is difficult and time consuming. Furthermore, listening to a song that is perfect for your current mood and activities is rare. Ex. Listening to death metal while trying to fall asleep. Music by Mood helps you by categorizing your music into separate folders based on many of the music's attributes, such as tempo and loudness. The app uploads songs that you own to the echo-nest api and, after filtering the songs by numerous attributes, it returns a folder where the music is located, containing all of the sorted music.