The great “Xbox Live Extras” app is now available for free on the Windows Phone 7 Marketplace in Switzerland

This is the one app you need to manager your Xbox Live account: customize your avatar, view your achievements, see what your Xbox Live friends are doing, compare scores and read your new messages, all can be done from within the app.

To get it, simply start the games hub on your Windows Phone 7 and tap on your avatar – or open the Marketplace hub and find “Xbox Live Extras”.