Best iPhone apps this week

Songify £free
From the creators of the Double Rainbow YouTube phenomenon comes an app that transforms speech into autotuned musical marvels. With 12 different songs to choose from and a Shazam-esque interface, recording your masterpiece is simple. So if you want to be an international pop star but possess no discernible musical talent, your international bid for stardom starts here. It's only free for a limited time, though.