Moodagent became available in Apple's App Store in late December, in a few weeks, 300,000 iPhone users have downloaded it.
The key element in the music program - and what makes it so special - is that it creates playlists based on user's mood.
By adjusting the five parameters, the user can determine the extent to which music should be characterized by one or more of the following five moods: sensuality, joy, anger, passion and pace.
The program is also available for Nokia phones, under the name DJ Playlist.