Not everyone can be as smart as all of us geniuses who studied experimental music in university. If they don't like this app for iOS and Android, they can either learn what they should know anyway or be forever bummed at the atonal clangs that emanate from your ringtones.
What does it do?
This is a digital approximation of the prepared pianos legendary experimental composer John Cage used for many of his most famous compositions. "Prepared piano", for those of you who don't know, is a piano with strings that have been pre-rigged with foreign materials to alter the sound. The sounds on Cage's piano supposedly sound like the real screws, bolts and washers he used for his own compositions.
Why do we like it?
Because you can record your compositions and set them as your ringtone as an eternal reminder to everyone around you of your musical prowess.