Gucci aren't the most obvious brand to be launching an iphone app but that is what they have done, getting creative director Frida Giannini and Mark Ronson to collaborate on the content. Features include a virtual turntable which allows you to mix your existing tracks, a playlist picked out by Ronson, a digest of recommended bars and restaurants in 20 cities and updates on the limited-edition collection of the Gucci/Ronson trainer project. And it's free as well. Available at www.itunes.com/appstore