Khush, the music creation company, has announced its third iPhone app. Talkapella transforms simple speech into four-part harmony. If follows the successful launches of the LaDiDa and Songify apps.

Here they are, the top iPhone apps of the week!

You want to be a singer? Before applying to American Idol, X Factor et. al., take a look at Songify, because even if you can't sing, this iPhone app can help you out. Thanks to the app's clever technology, users simply have to speak into their iPhone and Songify will auto-tune away, and create a catchy track out of your speech. Clever, huh?