If you look for it, you will find on the net also some evidence (at the customer reviews here had been not yet have). Remedy probably creates an app "Volume + 4 free", with which one after a few statements, however, destroy the speaker can (therefore not tested). In addition, the app does not work under JellyBean - but what have I bought a Galaxy Nexus, if I do not upgrade it to JellyBean, or can no longer use?
So: do not buy!