The app is free, with intermittent ad interruptions. You may remove all ads and interruptions by upgrading to a Pro version. The Pro versions (Basic and Premium) also include a color modulator which produces stunning visuals by cycling smoothly between your favorite colors.
The Premium version includes a musical note display, which translates the sounds into musical notes. This allows anyone to sing a perfect "A," without even hearing a reference note. Spectrojam can display up to 3 musical notes at the same time, allowing you to pick apart chords and harmonies. It works great with the human voice and musical instruments. The Premium version also includes a high-resolution spectrogram displaying up to 8,192 individual frequencies for extremely high precision and maximum clarity.