I developed the official Charlie Sloth App in Corona, advertised on the inside cover of his latest album.
It’s not perfect as could never get the scrolling between soundboards to not press a button (hard to explain).
Anyway it’s a free app to promote the album and vice versa.
https://itunes.apple.com/gb/app/charlie-sloth-soundboard/id944843207?mt=8
Thanks,
Dave