I've already uninstalled it. I don't remember seeing a toast.
I manually did the toggle, in the app, and with the tile.
I'll have to install and try again.
Edit...
Installed it and hit the Test Now appbar icon.
Every time I hit that icon, it gave a toast notification that said Normal Mode Activated.
I pinned the Toggle tile.
Every time I hit that tile, it looks like it opens and closes the app.
No toast notification is given.
I pinned 0 volume and 30 volume tiles and they do the same thing as the toggle tile.
None of the options seem to change the volume sliders.
Maybe it just doesn't like my phone (Samsung Ativ Odyssey - Windows Phone 8.1).
JJ