To install and use TuneWiki please follow these instructions:
Launch Installer by pressing its icon on the SpringBoard.
Press the Install tab at the bottom of the screen.
Press to select Multimedia from the list of Categories.
Press to select TuneWiki from the list of Packages.
Press the Install button at the top right hand corner of the screen
Press the large Install button that appears.
When done you will be return the Categories list. Press the Home button to return to your SpringBoard. You will notice a new TuneWiki icon. Press it to launch the application.
Press the OK button the bottom left corner of the screen.
You will be presented with a list of the music available on your iPhone. Press to select an artist.
Press to select a song you would like to use.
TuneWiki will begin playing your song and display its lyrics on the screen. The lyrics in white indicate the current line and the lyrics in grey indicate the next line to be sung.
The TuneWiki Community also provides access to song lyrics search, Top 10 Artists, Top 10 Songs, and Google Locate.
You can access these services through the Community button in TuneWiki.
You can read more about TuneWiki here