XII is here, but there's not much information about it

Whilst this app does sound like it might be an interesting and even useful thing to have around, $19.99 for an app with only this as it's description (see below) seems a little expensive to me. However, you should as always, make up your own mind.

XII is an "auto-composition" app that generates music with Twelve-tone technique.

This is the piano version.

• real-time calculation
• sequence setup.
• background audio.
• wifi-midi send.

Doesn't seem like a lot to go on for $19.99, in my opinion.